Airworthiness Directive · Amendment 39-14317 · Fokker Model F27 Mark 050 Airplanes
Fokker Model F27 Mark 050 Airplanes
Superseded. A later AD replaced this one: AD 2009-06-15. Comply with the one in force.
This AD applies to Fokker Model F27 Mark 050 airplanes, certificated in any category, as identified in Fokker Service Bulletin SBF50-61-023, dated November 3, 2004.
The FAA is adopting a new airworthiness directive (AD) for certain Fokker Model F27 Mark 050 airplanes. This AD requires repetitive visual checks for oil leaks of both engines between the spinner and the engine cowling, and directly behind the heated intake lip of the engine; repetitive inspections for oil leaks at the feathering pump on both engines; and corrective actions if necessary. This AD results from reports of oil leakage at the engine feathering pump. We are issuing this AD to prevent oil loss from the feathering pump, which could cause the engine to shut down in flight.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Before the next flight after the effective date of this AD: Do a visual check for oil leaks between the spinner and the engine cowling, and from directly behind the heated intake lip, of both engines, in accordance with Fokker All Operator Message (AOM) AOF50.037 (Ref TS04.57535), dated November 2, 2004. Repeat the visual check thereafter before each flight. If any leak is found, before further flight, do the action in paragraph (g) of this AD.
Except as required by paragraph (f) of this AD, at the applicable time in paragraph (g)(1) or (g)(2) of this AD: Do a detailed inspection for oil leaks at the feathering pump on both engines and do any applicable corrective action before further flight. Do all actions in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF50-61-023, dated November 3, 2004. Repeat the detailed inspection thereafter at the applicable interval in paragraph (g)(1) or (g)(2) of this AD.
(1) For airplanes identified in paragraph 1.A. “Effectivity,” sub-paragraph (1) of the service bulletin: Do the first inspection before the next flight after the effective date of this AD, and repeat the inspection thereafter before each flight.
(2) For airplanes identified in paragraph 1.A. “Effectivity,” sub-paragraph (2) of the service bulletin: Do the first inspection within 32 flight hours after the effective date of this AD, and repeat the inspection thereafter at intervals not to exceed 32 flight hours.
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.”
Although Fokker AOM AOF50.037 (Ref TS04.57535), dated November 2, 2004, specifies that operators should report cases of oil leakage and send failed O-rings to Fokker Services B.V., this AD does not include that requirement.
