Service difficulty report · Aileron · Boeing 747446

Difficulty date
May 20, 2025
Submitted
May 27, 2025
Operation
Air carrier
Aircraft
N742CK
Make and model
Boeing 747446
Aircraft serial
24424
Aircraft time
23,436 hours, 25,447 cycles
Part
Aileron
Condition
Stuck
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
D

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

What was found

FAILS CONTROL CHECK RIGHT OUTBOARD AILERON REMAINS UP. REFERENCE LOGBOOK ENTRY 100231222/100231226 FOR AILERON CONTROL CABLE REPLACEMENT, AILERON ADJUSTMENT AND TEST. PERFORMED AILERON ADJUSTMENT TEST IAW B747-400 AMM 27-11-00 ALL CHECKS GOOD. 100231223- REFERENCE WORK ORDER 100231222: WHILE TROUBLESHOOTING THE RIGHT-HAND OUTBOARD AILERON STUCK IN THE UP POSITION, FOUND RIGHT HAND INBOARD AILERON EXTREMELY SLOW TO TRAVEL TO DOWN POSITION. PERFORMED AILERON TRIM CONTROL ADJUSTMENT AND TEST IAW AMM 27-11-00 ALL CHECKS GOOD. 100231225- PERFORM GENERAL VISUAL INSPECTION OF OUTBOARD RIGHT-HAND AILERON PER COMPANY REQUEST IN REFERENCE TO LOG PAGE 100231222. PERFORMED GENERAL VISUAL INSPECTION OF RIGHT-HAND OUTBOARD AILERON. NO DEFECTS NOTED AT THIS TIME IAW B747-400SF 51-00-00. 100231226- REFERENCE WORK ORDER 100231222: UPON FURTHER INVESTIGATION FOUND CONTROL CABLE AA10 FOR RIGHT HAND OUTBOARD AILERON TO BE BROKEN. REMOVED AND REPLACED RIGHT HAND OUTBOARD AILERON CONTROL CABLE AA10 IAW AMM 27-11-00 RIG AND OPS CHECK GOOD. 100231230- DUE TO THE REMOVAL AND REPLACEMENT OF AILERON CONTROL CABLES AA10/AB10 AIRCRAFT REQUIRES EVALUATION FLIGHT PER GMM 3.4.1. AIRCRAFT RELEASED FOR FUNCTIONAL EVALUATION FLIGHT ONLY.