N77552
Registered owner: UNITED AIRLINES INC, IL (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
4 reports on file, 2025-11-13 – 2026-08-29.
Part: DOOR — OPEN (EXTERNAL POWER) · airframe 12,166 hrs · 4,040 cycles
HIGH FREQUENCY VIBRATION HEARD & FELT ON FLIGHT DECK & FWD LAV. FOUND EXTERNAL POWER DOOR OPEN UPON ARRIVAL. INSPECTED EXTERNAL POWER DOOR AND SURROUNDING AREA. NO DEFECTS NOTED. VERIFIED EXTERNAL POWER DOOR CLOSES AND SECURES PROPERLY IAW AMM 52-49-02-400-801. NO OTHER DEFECTS NOTED, ACFT OK FOR SERVICE.
Part: SKIN — DEFORMED (ZONE 800) · airframe 10,270 hrs · 3,385 cycles
ON WALK AROUND DAMAGE DISCOVERED AFT OF THE AFT CARGO DOOR. DAMAGE IS LOCATED AT BS 863-867 AND BETWEEN STR 20R - 21R. DAMAGE IS APPROX 8.5" X 7"REMOVED RIVETS IN THE STRINGER 20R AND 21R AND IN THE SHEAR TIES IN THE DAMAGED AREA FOR REPAIR PREFORMED CUT OUT OF DAMAGED SKIN PER SRM 53-00-01-2R-36 PAR 4.C AND VERIFIED SKIN AROUND CUTOUT IS BACK TO INITIAL CONTOUR. REQUEST HFEC FOR CUTOUT, COUNTERSINKS AND HOLE PROBES PER PAR 4.E.1-4.E.3 ACP B737 SRM 53-00-01-2R-36 STEP 4(E). IAW NTM PART 6-51-00-00 PROC. 23 , NTM PART 6-51-00-00 PROC. 16 AND NTM PART 6-53-30-00 PROC. 3 WITH NO DEFECTS. NEED TO VERIFY REPAIR MATERIALS IAW SRM 53-00-01-2R-36 TABLE 201 , VERIFIED REPAIR MATERIALS IAW SRM 53-00-01-2R-36, TABLE 201. LAYED OUT REPAIR FASTENER ROWS AND PILOT DRILLED ACFT IAW SRM 53-00-01-2R-36 CONTINUE FABRICATION OF ALL REPAIR PARTS, DRILLED & COUNTERSINK MOST HOLE, TRIM OUT DOUBLER & TRIPLE IAW SRM 53-00-01-2R-36. FABRICATED REPAIR PARTS IAW SRM 53-00-01-2R-36 STEPS H-M , ALSO REQUEST VERIFICATION OF CONICAL WASHERS INSTALLED PER STEP P . PERFORMED REQUIRED RII INSP & VERIFIED DRILL UP & FABRICATION IAW SRM 53-00-01-2R-36 STEPS H-M. OK TO ASKIN REPAIR COMPLETED REF SRM 53-00-01-2R-36.
Part: CONTROL CABLE — FAULTED (ZONE 300) · airframe 10,232 hrs · 3,371 cycles
HORIZONTAL STAB CABLES STA & STAB WERE REPLACED. EA2700-02282 AMM/ 27-41-82-400-801. (FOLLOW UP DIP) DO TO GRADE D STAB CONTROL CABLES STA & STB INSTALLED RE-TENSIONING OF BOTH STAB & STAB CABLES ARE REQUIRED IAW APPLICABLE AMM AFTER 3 MONTHS BUT NOT TO EXCEED 4 MONTHS FROM THE ACCOMPLISHMENT OF TASK. MCO MX REPLACED HORIZONTAL STAB CABLES STA AND STB GRADE D CABLE ASSY WITH HIGH ZINC COATING.
Part: UNKNOWN — ODOR (CABIN) · airframe 9,637 hrs · 3,176 cycles
F/A REPORTS PROPANE-LIKE GAS SMELL AROUND MID CABIN LAV. PERFORMED SMOKE/FUMES IN CABIN CHECK, NO FUMES/ODOR NOTED, INTERMITTENT FAULT REF FIM 21-00 TASK 830.