# SDR AALA202303239642

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2023
- Submitted: March 23, 2023
- Operation: Air carrier
- Aircraft: [N751AN](https://openairdocs.org/aircraft/N751AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30798
- Aircraft time: 83,030 hours, 10,831 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Bypass Valve
- Part number: 8102141
- Condition: Unserviceable
- Location: Zone 100 - Fuse
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202303239642

## Discrepancy

AIRCRAFT WAS GROUNDED: RETURNED TO MIA, AFT CABIN TEMPERATURE UNCONTROLLABLE WITH CURRENT AIR CONDITIONING MEL ITEMS. **SUPPLEMENTAL REPORT REQUIRED FOR AALA202302130552: MAINTENANCE REPLACED RIGHT AIR CYCLE MACHINE (ACM) PER AMM 21-52-00 (AALA202302130552), RIGHT ECONOMY COOLING VALVE PER AMM 21-52-31 (AALA202303236953), RIGHT SECOND STAGE TURBINE BYPASS VALVE PER AMM 21-52-32 (AALA202303239642), AND RIGHT DUAL HEAT EXCHANGER PER AMM 21-52-01 (AALA202303235628). ACCOMPLISHED SATISFACTORY OPERATIONAL AND LEAK CHECKS PER AMM 21-52-02.**(CLOSED)

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