Airworthiness Directive · Amendment 39-16031 · Boeing Model 727 Airplanes
Boeing Model 727 Airplanes
This AD applies to Boeing Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 727 airplanes. This AD requires performing an operational test of the engine fuel suction feed of the fuel system, and other related testing and corrective actions if necessary. This AD results from a report of in-service occurrences of loss of fuel system suction feed capability, followed by total loss of pressure of the fuel feed system. We are issuing this AD to detect and correct failure of the engine fuel suction feed capability of the fuel system, which could result in multi-engine flameout, inability to restart the engines, and consequent forced landing of the airplane.
Comply with this AD within the compliance times specified, unless already done.
Within 7,000 flight hours or 18 months after the effective date of this AD, whichever occurs first: Perform an operational test of the engine fuel suction feed of the fuel system, and perform all other related testing and corrective actions, as applicable, before further flight, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 727-28-80, dated June 21, 1985. Repeat the operational test thereafter at intervals not to exceed 7,000 flight hours or 36 months, whichever occurs first.
Operational tests of the engine fuel suction feed of the fuel system and follow-on corrective actions done in accordance with the requirements of AD 2007-11-08 are acceptable for compliance with the corresponding requirements of this AD if done within the compliance time specified in this AD.
If any discrepancy is found, and Boeing Service Bulletin 727-28-80, dated June 21, 1985, specifies that certain actions (i.e., a vacuum test of the fuel feed system) may be accomplished using an operator's “equivalent procedure” (with substitute test equipment): The actions must be accomplished in accordance with Figure 4 of Boeing Service Bulletin 727-28-80, dated June 21, 1985.
