Legal Interpretations
Kinder 2012
Summary
The Question
Does the FAA's July 5, 2011 interpretation on duty to answer phone calls during rest apply to all 14 CFR part 121 rest periods or only to 14 CFR 121.485?
Background
A first officer said United Airlines took the position that the July 5, 2011 interpretation, which found that an obligation to answer a phone call or message interrupts rest, applies only to 14 CFR 121.485.
The FAA’s Interpretation
It applies to all rest periods. A specific section may set the amount or timing of rest, but the quality of rest is the same wherever the term appears: rest must be continuous, determined prospectively, and free from all restraint by the certificate holder. The FAA called the narrower reading a misreading and noted its rest interpretations apply to both 14 CFR part 121 and 14 CFR part 135.
- Requester
- Kinder
- Issued
- May 3, 2012
- Subjects
- Air Carrier & Commercial Operations · Flight & Duty Time
Regulations Cited
Page 1
U.S. Department
of Transportation
Federal Aviation
Administration
Mt:., ·- 3 2012
First Offiper Scott Kinder
Dear Mr. Kinder,
Office of the Chief Counsel 800 Independence Ave., S.W.
Washington, D.C. 20591
This is in response to your email of January 25, 2012, asking whether the decision in the July 5, 2011 letter of interpretation to James W. Johnson from RebeccaB. MacPherson, Assistant Chief Counsel for Regulations ("July 5, 2011 letter"), was meant to apply to part 121 rest requirements in general or only as they relate to a specific section of the part 121 flight and duty regulations. A specific section may dictate the amount or timing of the rest, but the quality of the rest required is the same, no matter where the term appears in the regulations. The FAA has consistently found that any rest period must be "l) continuous, 2) determined prospectively (i.e., known in advance) and 3) free from all restraint by the certificate holder." See, Letter to Glenn Jimenez from Rebecca B. MacPherson, Assistant Chief Counsel for Regulations (Jun. 2011 ).
At issue in the July 5, 2011 letter was whether a pilot's obligation to respond to a telephone call or message from a certificate holder during a post-trip rest period interrupted the rest period. The FAA found that any period during which a pilot is under a present obligation to answer a telephone call or message would not be considered part of a rest period. 1 Your email states that United Airlines has taken the position that the July 5, 2011 letter applies to § 121.485 only. This is a misreading of the July 5, 2011 letter, which did not qualify when the definition of "rest" is to be applied. Consistent with previous interpretations, the July 5, 2011 letter clearly stated that "all rest periods share the same freedom-from-obligation requirements." .
The FAA has also previously stated that "(i)t follows that our legal interpretations regarding the use of beepers, reserve pilots, on-call or standby status, and crewmember rest apply to both part 121 and part 135 notwithstanding the specific section addressed in the interpretation." See, Letter to Jim Mayors from Rebecca B. MacPherson, Assistant . 1 The emphasis here is on the obligation to answer. The FAA.notes that the "one phone c~ll" policy is a limited exception to the requirement that the rest period be contmuous, provided that the certificate holder does not require the pilot to answer or respond to the call. Tue policy allows crewmembers, on their own volition, to receive a phone call without the phone call being viewed as disruptive and breaking the continuous rest period.
Page 2
Chief Counsel, Regulations (Mar. 2009). As a result, the July 5, 2011 letter's "freedom-from-obligation" finding is to be applied to all rest periods, no matter which section of the regulations a required rest _period falls under.
We appreciate your patience and trust that the above responds to your concerns. If you need further assistance, please contact my staff at (202) 267-3073. This response was prepared by Robert H. Frenzel, Manager, Operations Law Branch, Regulations Division of the Office of the Chief Counsel, and coordinated with the Air Transportation Division of Flight Standards Service.
Sincerely,
Rebecca B. MacPherson
Assistant Chief Counsel for Regulations, AGC-200
Regulations Referenced
Snapshot retrieved August 6, 2026.