# SDR CALA2026082418860

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2026
- Submitted: August 24, 2026
- Operation: Air carrier
- Aircraft: [N674UA](https://openairdocs.org/aircraft/N674UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29242
- Aircraft time: 90,733 hours, 17,540 cycles
- Engine: Pwa PW4060
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Controller
- Part number: 211734220
- Part serial: 367
- Condition: Faulted
- Location: Apu Inlet
- Part time: 4,655 hours, 651 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026082418860

## Discrepancy

VIBRATION ON RT SIDE OF ACT, DID NOT FEEL IT BEHIND FIRST CLASS.  WHILE STARTING BOTH ENGINES,  FELT VIBRATION ONLY ON FIRST OFFICER`S SIDE OF THE FLT DECK.  VIBRATION WENT AWAY DURING TAXI & TAKEOFF.  IN CLIMB, FELT VIBRATION ON F/O SIDE OF FLT DECK ONLY.  VIBRATION STOPPED AFTER LANDING. NO ABBNORMAL EICAS MESSAGES. ALL PARAMETERS NORMAL.   RAN NR 2 ENGINE. NO NOISE OR VIBRATION NOTED.  ENGINE PARAMETERS NORMAL IAW AMM 05-51-38-202-001.  AIRFRAME VIBRATION CONDITIONAL INSPECTION PROCEDURE B ITEM 3, APU CONTROL UNIT REQUIRES REPLACMENT.  CONTROLLER RECOMMENDED TO HAVE TECHS PERFORM A GVI OF THE APU INLET DOOR COMPONENTS TO ENSURE NO DAMAGE OR ABNORMALITIES EXIST THAT COULD CAUSE THE DOOR TO REMAIN OPEN WITH APU OFF. R & R APU CONTROL UNIT IAW AMM 49-61-05. OPS CHKD GOOD.  PERFORMED GVI OF APU INLET DOOR COMPONENTS & FOUND NO DEFECTS, DAMAGE, OR OBSTRUCTIONS IN INLET.  OPS DOOR MULTIPLE TIMES WITH NO ISSUES.

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