# SDR CALA2016070895511

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2016
- Submitted: July 8, 2016
- Operation: Air carrier
- Aircraft: [N788UA](https://openairdocs.org/aircraft/N788UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26942
- Aircraft time: 84,415 hours, 11,465 cycles
- Engine: Pwa PW40903
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Precooler
- Condition: Damaged
- Location: Rt A/C Pack
- 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/CALA2016070895511

## Discrepancy

SOUND & VIBRATION OCCURED FOR A FEW SECONDS DURING CLIMB AT 10K FT, NOISE HEARD AT DOORS L1, 2, AND R2. LOW RUMBLING SOUND AND VIBRATION. DISSIPATED THEN HEARD AGAIN IN CRUISE ROW 8-10 UNDER FLOORBOARD.    IAW AMM 05-51-38-201 AIRFRAME VIBRATION CONDITIONAL INSPECTION.  FOUND DAMAGE TO RT PACK RAM AIR INLET DUCT AND PRECOOLER WITH DAMAGE.

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