# SDR AALA202205268362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2022
- Submitted: May 26, 2022
- Operation: Air carrier
- Aircraft: [N771AN](https://openairdocs.org/aircraft/N771AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29579
- Aircraft time: 89,754 hours, 11,762 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: A/C Pack
- Condition: Odor
- Location: Zone 100 - Fuse
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202205268362

## Discrepancy

AIRCRAFT WAS GROUNDED: AT CRUISE DURING FLIGHT CONFIDENCE FLIGHT, A SULFUR TYPE OF ODOR IN FLIGHT DECK UNTIL MIDDLE OF DESCENT. OPERATED LEFT AND RIGHT PACKS WITH AUXILIARY POWER UNIT AIR AT MULTIPLE TEMPERATURE SETTINGS FOR 3 HOURS PER AMM 21-00-00 . NO ODOR NOTED.

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