SDR UIEA2020120102496

Service difficulty report · Transmission · Boeing 74747UF

Difficulty date: November 28, 2020
Submitted: December 1, 2020
Operation: Air carrier
Aircraft: N498MC
Make and model: Boeing 74747UF
Aircraft serial: 29259
Aircraft time: 87,880 hours, 13,876 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Transmission
Part number: 256U32105
Part serial: AS00550
Condition: Malfunctioned
Location: Te Flaps
Stage of operation: CL
How discovered: O
Nature of condition: F
Precautionary procedure: A

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

What was found

AFTER TAKE OFF THE FLAP INDICATOR COULD NOT BE VERIFIED IN THE UP (COMMANDED) POSITION, SAME ON LANDING. TROUBLESHOOTING FOUND NR 3 FLAP TRANSMISSION SLEEPING DURING LAST FEW INCHES FROM FULLY UP. NR 3 FLAP TRACK/TRANSMISSION REPLACED, IAW AMM 27-51-33 REV 99. FLAPS OPERATE NORMAL.

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