Airworthiness Directive · Amendment 39-14424 · Boeing Model 737 Airplanes
Boeing Model 737 Airplanes
This AD applies to the airplanes identified in Table 1 of this AD, certificated in any category.
| Boeing airplane models— | As identified in Boeing Alert Service Bulletin— |
|---|---|
| 737-100, -200, -200C, -300, -400, and -500 series airplanes | 737-27A1274, dated February 17, 2005. |
| 737-600, -700, -700C, -800 and -900 series airplanes | 737-27A1271, dated December 16, 2004. |
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737 airplanes. This AD requires modifying the elevator input torque tube assembly. This AD results from a report of a restriction in the pilot's elevator input control system. A design review performed on the elevator input torque tube assembly in the course of the investigation discovered possible failure modes that could lead to a jam of the elevator control system. We are issuing this AD to prevent loss of elevator control and consequent reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 60 months after the effective date of this AD: Modify the elevator input torque tube assembly by doing all the actions in accordance with the Accomplishment Instructions of the applicable service bulletin in Table 1 of this AD. Where the applicable service bulletin specifies to re-identify the modified elevator torque tube assemblies using a rubber stamp, the part may be re-identified using a permanent method that is acceptable to the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office.
