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NTSB · Safety Recommendation

Safety Recommendation A-21-048

Recommendation

TO THE FEDERAL AVIATION ADMINISTRATION: Require organizations that design, manufacture, and maintain aircraft to establish a safety management system.

Safety Issue and Context

This report discusses the October 17, 2019, accident involving a Saab SA-2000 airplane, operated by Peninsula Aviation Services Inc. d.b.a. PenAir flight 3296, which overran the end of runway 13 at Unalaska Airport, Unalaska, Alaska. The airplane was substantially damaged during the runway overrun; as a result, of the 3 crewmembers and 39 passengers aboard, 1 passenger sustained fatal injuries, and 1 passenger sustained serious injuries. Eight passengers sustained minor injuries, most of which occurred during the evacuation.

Safety issues identified in this report include the potential for cross-wiring of airplane antiskid brake systems; insufficient Federal Aviation Administration (FAA) guidance to identify safety risks for air carriers experiencing significant organizational changes, including bankruptcy, acquisition, and merger; lack of FAA consideration of runway safety area dimensions during the process of authorizing an air carrier to operate its aircraft at a specific Title 14 Code of Federal Regulations Part 139 certificated airport, and the benefits of safety management systems for design, manufacturing, and maintenance organizations.

As a result of this investigation, the National Transportation Safety Board makes six new safety recommendations to the FAA, three new safety recommendations to the European Union Aviation Safety Agency, and one new recommendation to the Saab Group.

Response History

July 10, 2025 · NTSB Correspondence · FAA

From Aviation Investigation Report AIR-25-04, “In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282, Boeing 737 9, N704AL Portland, Oregon January 5, 2024” published on July 10, 2025:

1.11.2.3.2 Voluntary Safety Management System

According to the FAA, a safety management system (SMS) is “the formal, top down, organization-wide approach to managing safety risk and assuring the effectiveness of safety risk controls. It includes systematic procedures, practices, and policies for the management of safety risk” (FAA 2024c).

At the time of the accident airplane’s production, there was no Part 21 regulatory requirement for Boeing to have an SMS. Footnote: (a) On April 26, 2024, the FAA published its final rule requiring production certificate holders to implement SMS, effective May 28, 2024, with most organizations, including Boeing, required to comply within 36 months.

FAA personnel assigned to Boeing expressed no concerns about the company’s ability to implement its regulatory SMS in the specified timeline. (b) The SMS final rule was responsive to a Congressional statutory mandate (in division 5, section 102 of the Consolidated Appropriations Act, 2021), recommendations from two aviation rulemaking committees, and, in part, NTSB Safety Recommendation A 21 48, which asked the FAA to require organizations that design, manufacture, and maintain aircraft to establish an SMS. (c) Title 14 CFR Part 21 outlines the processes and standards for certifying aircraft, associated products, components, and equipment, along with the organizations responsible for their design and manufacturing.

The regulation covers three primary certification categories: type, production, and airworthiness. However, in December 2015, the FAA had required Boeing to create an SMS as part of a settlement agreement developed to address multiple alleged quality and certification lapses. Footnote: The settlement agreement, which also required Boeing to adopt a regulatory compliance plan and implement an internal auditing system for its organization designation authorization unit, among other activities, was entered into by the FAA and Boeing to resolve allegations documented in 13 FAA enforcement investigative reports.

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Recommendation Facts

Status
Open - Unacceptable Response
Issued
November 18, 2021
Priority
CLASS II
Recipient
FAA
Adopted
November 2, 2021
Related Investigation
DCA20MA002
Related Report
AAR-21-05

At the time of the agreement, Boeing had adopted an SMS plan and agreed that it would follow its SMS manual, which the FAA had reviewed.

In December 2020, the FAA accepted Boeing’s voluntary safety management system (VSMS), which became operational in June 2021. According to Boeing’s VSMS manual, the program’s goal was to identify, assess, and control hazards and mitigate risks based on a thorough understanding of the systems, processes, human factors, and operating environment.

During the investigation, Boeing reported that its VSMS was in place at the enterprise, business, major functions, test, and technology levels and that it had been working toward a 2025 timeframe for full integration on the production line. At the time of the accident, Boeing had not yet fully implemented its VSMS to the Boeing 737 production level but was actively working to integrate SMS principles into its QMS while awaiting the FAA’s final rule regarding Part 5 for Part 21 operations, which would provide additional guidance about how to meet regulatory standards for the program.

Footnote: The FAA had previously developed SMS implementation guidance for aircraft operators, but such guidance did not yet exist for production approval holders. Like a regulatory SMS, Boeing’s VSMS structure was composed of four pillars: safety policy, safety risk management (SRM), safety assurance, and safety promotion.

None of the FAA inspectors interviewed during this investigation had yet received any training on providing oversight of an SMS, and none had performed an audit specifically of Boeing’s VSMS. According to an FAA manager, there was no guidance for providing oversight of a non-regulatory program. Footnote: The FAA inspector (who was interviewed before the FAA’s April 2024 final rule for SMS was issued), anticipated that his team would become fully involved in overseeing Boeing’s SMS once the final rule is issued, and they are provided policy and guidance for performing SMS oversight.

February 26, 2025 · NTSB Correspondence · FAA

In our August 19, 2024, letter, we noted that your final rule, “Safety Management Systems,” which was published on April 26, 2024, requires production certificate and type certificate holders under Part 21 to have an SMS; however, it does not require an SMS for those organizations that maintain aircraft, such as Part 145 repair stations. Although your NPRM solicited input on expanding SMS requirements to Part 145 repair stations in a future rulemaking, we are not aware of any plans to initiate such rulemaking. Accordingly, the Board has classified Safety Recommendation A-21-48 OPEN-- UNACCEPTABLE RESPONSE.

August 19, 2024 · NTSB Correspondence · FAA

In our comments regarding your NPRM, we supported the expansion of SMS requirements to production certificate and type certificate holders under Part 21, and agreed with the FAA’s statement that this action could help mitigate or prevent accidents involving design and production issues. We pointed out, however, that the NPRM only partially responded to this recommendation because it only addressed the design and manufacturer aspects of this safety recommendation and not the maintenance aspect.

We note that the final rule requires production certificate and type certificate holders under Part 21 to have an SMS; however, it does not require an SMS for those organizations that maintain aircraft, such as Part 145 repair stations. Although your NPRM solicited input on expanding SMS requirements to Part 145 repair stations in a future rulemaking, we are not aware of any plans to initiate such rulemaking. Therefore, pending our review of a plan to address the maintenance aspect of this recommendation, Safety Recommendation A-21-48 is classified OPEN-- UNACCEPTABLE RESPONSE.

March 7, 2024 · Recipient Response · FAA

-From Michael G. Whitaker, Administrator: We previously informed the Board the Safety Management System (SMS) NPRM published January 11, 2023 (88 FR 1932). The SMS NPRM public comment period closed April 11, 2023. This NPRM proposes to extend the requirement for an SMS to all certificate holders operating under the rules for commuter and on-demand operations, commercial air tour operators, production certificate holders that are holders or licensees of a type certificate (TC) for the same product, and holders of a TC who license out that TC for production.

In addition, the FAA is currently gathering broad input from industry stakeholders and our international regulatory partners to build better connections and interrelationships with the existing mandatory SMS of airlines and voluntary SMS of other carriers, airports, manufacturers, and service providers. The FAA is currently developing an SMS final rule in response to the comments received to the NPRM. In the 2023 Fall Unified Agenda, the FAA noted that it expects to publish the final rule in July 2024.

As previously noted, the FAA recognizes that recurrent outreach and education is important in ensuring that subject matter experts in government and industry alike are knowledgeable in properly meeting regulations and following guidance. Therefore, the FAA will continue to provide education relating to SSA in the future.

I will keep the Board informed of the FAA’s progress on Safety Recommendations A-21-47 and A-21-48 and anticipate providing an update by February 28, 2025.

October 2, 2023 · NTSB Correspondence · FAA

In our March 10, 2023, comments regarding your January 11, 2023, NPRM, we supported the expansion of SMS requirements to production certificate and type certificate holders under Part 21, and agreed with the FAA’s statement that this action could help mitigate or prevent accidents involving design and production issues. We pointed out, however, that the NPRM only partially responded to this recommendation because it only addressed the design and manufacturer aspects of this safety recommendation and not the maintenance aspect.

We encourage you to address this concern in the final rule. In the meantime, pending our review of the published final rule and completion of the recommended actions, Safety Recommendation A-21-48 remains classified OPEN-- ACCEPTABLE RESPONSE.

April 11, 2023 · Recipient Response · FAA

-From Billy Nolen, Acting Administrator: The Federal Aviation Administration (FAA) published the Safety Management Systems (SMS) Notice of Proposed Rulemaking on January 11, 2023 (88 FR 1932). The FAA is proposing to update and expand the requirements for SMS and require certain certificate holders and commercial air tour operators to develop and implement an SMS.

This proposed rule would extend the requirement for an SMS to all certificate holders operating under the rules for commuter and on-demand operations, commercial air tour operators, production certificate holders that are holders or licensees of a type certificate (TC) for the same product, and holders of a TC who license out that TC for production.

This rulemaking effort and subsequent supporting guidance and FAA oversight will satisfy the intent of these safety recommendations.

I anticipate providing an update to Safety Recommendations A-16-36, A-19-28, A-19-30, A-19-31, A-21-48, and A-22-15 by March 31, 2024.

March 10, 2023 · NTSB Correspondence · FAA

The National Transportation Safety Board (NTSB) has reviewed the Federal Aviation Administration’s (FAA’s) notice of proposed rulemaking (NPRM) titled, “Safety Management Systems,” which was published at 88 Federal Register 1932 on January 11, 2023. The NPRM proposes to expand the applicability of Title 14 Code of Federal Regulations (CFR) Part 5 Safety Management Systems (SMSs) beyond 14 CFR Part 121 operators to include 14 CFR Part 135 operators, air tour operators under 14 CFR 91.147, and certain certificate holders under 14 CFR Part 21.

The FAA states that the successful use of SMSs by Part 121 operators suggests that expanding SMS requirements can benefit other sectors of the aviation system. According to the NPRM, the proposed action addresses a congressional mandate and NTSB safety recommendations and moves the United States closer to harmonizing with International Civil Aviation Organization Annex 19 on SMSs for aviation service providers. The FAA analyzed our accident investigations to support this rulemaking project and demonstrate the benefits of SMSs.

Open NTSB Safety Recommendations on SMS

Six of our safety recommendations on SMSs issued to the FAA remain open. The oldest, Safety Recommendation A 16 36, asked the FAA to require that all Part 135 operators establish SMSs. We issued this safety recommendation from the investigation into the 2015 crash of a Part 135 on demand charter flight in which all nine persons onboard the airplane died. Footnote: We issued Safety Recommendation A 16 36 on November 3, 2016, as part of the final report of the investigation into a November 10, 2015, accident in Akron, Ohio.

The Hawker 700A airplane operating as an on demand charter flight under 14 CFR Part 135 departed controlled flight while on approach to the airport and impacted an apartment building. For more information, see NTSB. 2016. Crash During Nonprecision Instrument Approach to Landing, Execuflight Flight 1526, British Aerospace HS 125 700A, N237WR, Akron, Ohio, November 10, 2015. AAR-16-03. Washington, DC: NTSB. In the years since, we reiterated this safety recommendation in the final reports of seven Part 135 accidents resulting in 39 fatalities and nine serious injuries, and it is currently classified Open—Unacceptable Response.

Footnote: These accidents involved HEMS, air tours, and on demand charter operations. See NTSB accident reports AAR-17-02, AAR-18-02, AAR-19-02, AAR-20-01, AAR-21-01, AAR-21-04, and AIR-22-05. For a history of reiterations and correspondence with the FAA about this safety recommendation, see Safety Recommendation A 16 36. In 2019, Safety Recommendation A 19 28 asked the FAA to require all commercial air tour operators, regardless of their operating rule, to implement an SMS. This safety recommendation resulted from the investigation of an air tour accident conducted under 14 CFR 91.147 in New York, New York, in which the five passengers on board died.

Footnote: For more information on this March 11, 2018, accident involving an Airbus Helicopters AS350 which lost engine power during cruise flight, see NTSB. 2019. Inadvertent Activation of the Fuel Shutoff Lever and Subsequent Ditching, Liberty Helicopters Inc., Operating a FlyNYON Doors Off Flight, Airbus Helicopters AS350 B2, N350LH, New York, New York, March 11, 2018. AAR-19-04. Washington, DC: NTSB.

In March 2021, we reiterated Safety Recommendation A 19 28 in our investigation report on the safety of revenue passenger-carrying operations conducted under Part 91; the safety recommendation is currently classified Open—Acceptable Response. We also issued two new safety recommendations in that report: Safety Recommendations A 21 13 and -14 expanded our call for SMSs to include all Part 91 revenue passenger carrying operations such as sightseeing flights conducted in hot air balloons, intentional parachute jump flights, living history flight experience and other vintage aircraft flights, among others. Both recommendations are currently classified Open—Acceptable Response.

Footnote: Safety Recommendation A 21 13 asked the FAA require SMSs for the revenue passenger-carrying operations conducted under Part 91 or 14 CFR 119.1(e) exceptions, and Safety Recommendation A 21 14 asked that the FAA provide ongoing oversight of each operator’s SMS once established. For more information, see NTSB. 2021. Enhance Safety of Revenue Passenger Carrying Operations Conducted Under 14 Code of Federal Regulations Part 91. AAR-21-03. Washington, DC: NTSB.

In November 2021, following an accident involving the cross-wiring of the airplane’s antiskid brake systems that resulted in one fatality, we issued Safety Recommendation A 21 48 asking the FAA to require organizations that design, manufacture, and maintain aircraft to establish an SMS. Safety Recommendation A 21 48 is currently classified Open—Await Response. Footnote: For more information, see NTSB. 2021. Runway Overrun During Landing, Peninsula Aviation Services Inc., d.b.a. PenAir flight 3296, Saab 2000, N686PA, Unalaska, Alaska, October 17, 2019. AAR 21-05. Washington, DC: NTSB.

Most recently, in May 2022, we issued Safety Recommendation A 22 15 asking the FAA to develop guidance for small operators for scaling an SMS that includes methods and techniques for implementation and specific examples applicable to several operational sectors, including air tours. Footnote: Safety Recommendation A 22 15 is currently classified Open—Initial Response Received. For more information, see NTSB. 2022. Collision into Terrain, Safari Aviation Inc., Airbus AS350 B2, N985SA, Kekaha, Hawaii, December 26, 2019. AIR-22-05. Washington, DC: NTSB.

In the 15 years since our first aviation safety recommendation for SMSs in 2007, our investigations have consistently shown the need for aviation safety providers to implement SMSs to ensure its benefits to industry and the public are realized.

Our specific comments on areas of the NPRM relevant to these open safety recommendations follow.

Title 14 CFR Parts 135 and 91.147 SMS

We strongly support the proposed expansion of SMS requirements to include Part 135 operations without exceptions for the size of the operator. Safety Recommendation A-16-36 applies to all Part 135 operators because our investigations demonstrated that catastrophic accidents in Part 135 operations occur across a wide range of operator sizes. We believe that the safety of all Part 135 operations can be improved through implementation of SMSs. If the FAA issues a final rule requiring SMS for all Part 135 operations, it will likely satisfy the intent of Safety Recommendation A 16 36.

We appreciate that the FAA has recognized the need for SMS for HEMS operations, as we have previously recommended.

We also strongly support the proposed expansion of SMS requirements to include all operators conducting air tours under 14 CFR 91.147. As with our discussion on Part 135, we note that Safety Recommendation A-19-28 applied to all operators conducting air tour operations under 14 CFR 91.147 regardless of size. If this aspect of the NPRM were adopted as presented, it would likely satisfy the intent of Safety Recommendation A 19 28.

We appreciate that the diversity of Part 135 operators requires the FAA to consider how the rule can be effectively interpreted and heeded by operators spanning a wide range of characteristics, including their size and type of operations and available resources; this also applies to air tour operators under 14 CFR 91.147. In the NPRM, the FAA sought feedback (Question 2) from industry on whether the requirement for SMS should be limited to a certain subset of 14 CFR Part 135 and 91.147 operators, and what alternatives would achieve the same safety objectives as SMSs for operators not included under an SMS rule.

However, the value of an SMS to an operator comes from proactive management of safety through implementation of its four clearly defined and interdependent

September 1, 2022 · NTSB Correspondence · FAA

We note that you are reviewing these safety recommendations and determining an appropriate plan of action; however, you did not indicate if you intend to take the recommended actions or describe how you will make this determination. Therefore, we are unable to determine if your actions are responsive to these recommendations. Consequently, pending our receipt of this additional information, Safety Recommendations A-21-46 through -48 remain classified OPEN-- AWAIT RESPONSE.

January 25, 2022 · Recipient Response · FAA

-From Steve Dickson, Administrator: The Federal Aviation Administration (FAA) is currently reviewing these safety recommendations and determining an appropriate plan of action.

November 18, 2021 · NTSB Correspondence · FAA

The attached letter from the NTSB Chairman provides information about the NTSB’s November 2, 2021, report Runway Overrun During Landing, Peninsula Aviation Services Inc. d.b.a. PenAir Flight 3296, Saab 2000, N686PA, Unalaska, Alaska, October 17, 2019, NTSB/AAR 21/05. The details of this accident investigation and the resulting safety recommendations may be found in the attached report, which can also be accessed at http://www.ntsb.gov.

The NTSB is vitally interested in these recommendations because they are designed to prevent accidents and save lives. We would appreciate a response within 90 days of the date of this letter, detailing the actions you have taken or intend to take to implement these recommendations. When replying, please refer to the safety recommendations by number (for example, A-21-46 through -51). We encourage you to submit your response to ExecutiveSecretariat@ntsb.gov. If your reply exceeds 20 megabytes, including attachments, please e mail us at the same address for instructions on how to send larger documents. Please do not submit both an electronic copy and a hard copy of the same response.

This letter provides information about the National Transportation Safety Board’s (NTSB) November 2, 2021, report Runway Overrun During Landing, Peninsula Aviation Services Inc. d.b.a. PenAir Flight 3296, Saab 2000, N686PA, Unalaska, Alaska, October 17, 2019, NTSB/AAR-21/05. The details of this investigation and the resulting safety recommendations may be found in the attached report, which can also be accessed at http://www.ntsb.gov/.

As a result of this investigation, we identified the following safety issues:

• Potential for cross-wiring of airplane antiskid brake systems • Insufficient Federal Aviation Administration (FAA) guidance to identify safety risks for air carriers experiencing significant organizational changes, including bankruptcy, acquisition, and merger • Lack of FAA consideration of runway safety area dimensions during the process of authorizing an air carrier to operate its aircraft at a specific Title 14 Code of Federal Regulations Part 139-certificated airport • Safety management systems for organizations that design, manufacture, and maintain aircraft.

Accordingly, the NTSB makes the following safety recommendations to the FAA. Additional information regarding these recommendations can be found in the noted sections of the report.

• Identify all currently certificated transport-category airplanes for which system safety assessments for landing gear systems did not consider human error that could lead to cross-wiring of antiskid brake system components, including the wheel speed transducers, and require manufacturers of transport-category airplanes without such assessments to perform the assessments and then implement mitigations to prevent cross-wiring of antiskid brake system components. (A-21-46) (See section 2.3.4.1.)

• Require the submission and consideration of system safety assessments addressing the landing gear antiskid system for the certification of future transport-category airplane designs. The certification should ensure that the system safety assessments are consistent with the intent of Advisory Circular 25.1309, System Design and Analysis, and that the assessments evaluate and mitigate the potential for human error that can lead to a cross wiring error. (A 21-47) (See section 2.3.4.1.)

• Require organizations that design, manufacture, and maintain aircraft to establish a safety management system. (A-21-48) (See section 2.3.4.2.)

• Notify principal operations inspectors and frontline managers about the circumstances of this accident and emphasize the importance of existing Federal Aviation Administration guidance for detecting and mitigating the safety risks that can result when certificate holders experience significant organizational change, such as high personnel turnover, a reduction to route structures or flight schedules, bankruptcy, acquisition, and merger. (A-21-49) (See section 2.5.1.)

• Revise Order 8900.1, Flight Standards Information Management System, to include a formalized transition procedure to be used during a changeover of certificate management team personnel responsible for overseeing a certificate holder that is undergoing significant organizational change (for a reason described in volume 6, chapter 2, section 18 of the order) to ensure that incoming personnel are fully aware of potential safety risks. (A-21-50) (See section 2.5.1.)

• Include the runway design code for runways of intended use among the criteria assessed when authorizing a scheduled air carrier to operate its airplanes on a regular basis at an airport certificated under Title 14 Code of Federal Regulations Part 139. (A-21-51) (See section 2.5.2.)

The NTSB is vitally interested in these recommendations because they are designed to prevent accidents and save lives. We would appreciate a response within 90 days of the date of this letter, detailing the actions you have taken or intend to take to implement these recommendations. When replying, please refer to the safety recommendations by number (Safety Recommendations A-21-46 through -51). We encourage you to submit your response to ExecutiveSecretariat@ntsb.gov. If your reply, including attachments, exceeds 20 megabytes, please e-mail us at the same address for instructions. Please do not submit both an electronic copy and a hard copy of the same response.