# SDR AALA202208251187

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2022
- Submitted: August 25, 2022
- Operation: Air carrier
- Aircraft: [N825AA](https://openairdocs.org/aircraft/N825AA), registered now
- Make and model: Boeing 737
- Aircraft serial: 40644
- Aircraft time: 20,744 hours, 2,419 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Loop
- Condition: Detached
- Location: Zone 100 - Fuse
- Stage of operation: CR
- How discovered: V
- Nature of condition: S
- Precautionary procedure: A, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202208251187

## Discrepancy

AIRCRAFT WAS GROUNDED: RIGHT PACK FAILURE ONE HOUR INTO FLIGHT-PER CHECKLIST RESTORED TO NORMAL OPERATIONS. FAILURE AGAIN 20 MINUTES LATER, REMAINED FAILED PER CHECKLIST  REPEAT WRITE UP TIMES FOUR. RE-BONDED DISLODGED STANDOFF PER AARD 21-55-00-1. TROUBLESHOT PER FIM 21-50-F2-47A-421A-A STEPS 1.B.2 THROUGH 1.B.5. LOOP R1A, 171-10R, SHOWS NO SHORT TO GROUND. INSULATION RESISTANCE WITHIN LIMITS, ELEMENT RESISTANCE WITHIN LIMITS, NO VISIBLE EVIDENCE OF PHYSICAL DAMAGE TO LOOP. REATTACHED OVERHEAT STANDOFF LOOP.

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