Airworthiness Directive · Amendment 39-12026 · Learjet Model 35, 35A, 36, and 36A Series Airplanes
Learjet Model 35, 35A, 36, and 36A Series Airplanes
Model 35, 35A, 36, and 36A series airplanes, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to all Learjet Model 35, 35A, 36, and 36A series airplanes, that requires revision of the Airplane Flight Manual (AFM) to add procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activated. This amendment is intended to prevent incapacitation of the flightcrew due to lack of oxygen and consequent loss of control of the airplane due to absence of AFM procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activated.
To prevent incapacitation of the flightcrew and consequent loss of control of the airplane due to delays in donning oxygen masks in response to the activation of the cabin altitude warning horn, accomplish the following:
(a) Within 10 days after the effective date of this AD, revise the Emergency Procedures Section of the FAA-approved Airplane Flight Manual (AFM) by accomplishing the actions specified in paragraphs (a)(1) and (a)(2) of this AD:
(1) Revise the title for the existing “Emergency Descent” section to read:
(2) Insert the procedures specified below between the new, revised title specified in paragraph (a)(1) of this AD and the existing procedures for emergency descent specified in the AFM.
“Don Oxygen Masks and Select 100% oxygen.”
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
