Service difficulty report · Jackscrew · Piper PA31T

Difficulty date
February 9, 2006
Submitted
February 24, 2006
Operation
Air carrier
Aircraft
N419R
Make and model
Piper PA31T
Aircraft serial
31T7820034
Engine
Pwa PT6A60A
Part
Jackscrew
Part number
489516
Part serial
021M
Condition
Jammed
Location
Flap System
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PILOT REPORTED ASYMMETRICAL FLAP CONDITION ON LANDING. FOUND RT FLAP EXTENDED APPROX 10 DEGREES, AND JACKSCREW TO FLAP ATTACH BRACKET TORN FROM FLAP. THE TRANSMISSION AND FLAP SYSTEM WAS INSPECTED IAW AD AND FOUND TO MEET SPECS (MEASUREMENTS HAD NOT CHANGED FROM PREVIOUS INSPECTIONS). UPON REMOVAL FROM THE AC, IT WAS DETERMINED THAT THE JACKSCREW HAD JAMMED AT THE END OF ITS TRAVEL. I WOULD RECOMMEND AN ADDITIONAL INSPECTION OF THE JACKSCREW EACH 500 HRS BY REMOVAL FROM AC AND INSPECTING FOR WEAR AND FREEPLAY THROUGHOUT THE TRAVEL RANGE OF THE JACKSCREW AND BARREL ASSY. OPERATOR PLANS TO LIMIT THE SERVICE LIFE OF THIS COMPONENT TO 1500 HRS REGARDLESS OF WEAR LIMITS. (K)

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