# SDR HALA2023040300076

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2023
- Submitted: April 3, 2023
- Operation: Air carrier
- Aircraft: [N388HA](https://openairdocs.org/aircraft/N388HA), registered now
- Make and model: Airbus A330-243
- Registry model: [Airbus A330-243](https://openairdocs.org/model/airbus-a330-243) (OpenAirDocs)
- Aircraft serial: 1310
- Aircraft time: 44,139 hours, 6,948 cycles
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- Stage of operation: UK
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA2023040300076

## Discrepancy

ETOPS - APU FREQUENCY 387HZ AND AMBER. EITHER PACK-1 OR PACK-2 ON WILL CAUSE APU FREQUENCY TO FLUCTUATE FROM (384HZ-387HZ, 96%RPM), WHEN BOTH PACKS ARE OFF ALL STABILIZES (115V/400HZ-100%RPM) AND STEADY. FWD APU BLEED TO MEL  36-12-1, NO M PROCEDURES, PLACARD INSTALLED, UPDATED LIDS. AWAITING RESOLUTION.

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