Airworthiness Directive · Amendment 39-14258 · Boeing Model 757 Airplanes
Boeing Model 757 Airplanes
Superseded. A later AD replaced this one: AD 2016-11-06. Comply with the one in force.
This AD applies to Model 757-200, -200PF, -200CB, and -300 series airplanes; certificated in any category; equipped with Rolls-Royce engines; as identified in Boeing Alert Service Bulletins 757-28A0073 and 757-28A0074, both Revision 1, both dated February 24, 2005.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 757 airplanes. This AD requires inspections of certain wire bundles in the left and right engine-to-wing aft fairings for discrepancies; installation of back-to-back p-clamps between the wire and hydraulic supply tube at the aft end of the right-hand strut only; and associated re-routing of the wire bundles, if necessary. This AD results from a report indicating that a circuit breaker for the fuel shutoff valve tripped due to a wire that chafed against the structure in the flammable leakage zone of the aft fairing, causing a short circuit. We are issuing this AD to prevent chafing between the wire bundle and the structure of the aft fairing, which could result in electrical arcing and subsequent ignition of flammable vapors and possible uncontrollable fire.
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, do the actions required by paragraphs (f)(1) and (f)(2) of this AD.
(1) Accomplish the detailed inspections for discrepancies of the wire bundles in the left and right engine-to-wing aft fairings, and applicable and related investigative and corrective actions if necessary, as applicable, by doing all the actions specified in the Accomplishment Instructions of the applicable service bulletins listed in Table 1 of this AD. Accomplish any related investigative and corrective actions before further flight in accordance with the applicable service bulletin.
| Boeing airplanes | Boeing Alert Service Bulletin | Revision level | Date |
|---|---|---|---|
| Model 757-200, -200CB, 200PF series airplanes | 757-28A0073 | Original | November 20, 2003. |
| Model 757-200, -200CB, 200PF series airplanes | 757-28A0073 | 1 | February 24, 2005. |
| Model 757-300 series airplanes | 757-28A0074 | Original | November 20, 2003. |
| Model 757-300 series airplanes | 757-28A0074 | 1 | February 24, 2005. |
(2) Install back-to-back p-clamps between the wire and hydraulic supply tube at the aft end of the right-hand strut only; and re-route the wire bundles, if necessary, by doing all the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 757-28A0073 or 757-28A0074, both Revision 1, both dated February 24, 2005; as applicable.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
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
