# SDR UIEA2018121502843

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2018
- Submitted: December 24, 2018
- Operation: Air carrier
- Aircraft: [N1499A](https://openairdocs.org/aircraft/N1499A), registered now
- Make and model: Boeing 767328
- Aircraft serial: 27428
- Aircraft time: 77,084 hours, 16,692 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 70210
- Part serial: 104247
- Condition: Faulty
- Location: Ac System
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018121502843

## Discrepancy

FWD EQUIP VALVE ADVISORY MESSAGE. REACTIVATED EQUIP COOLING SYSTEM AND FOUND NO FAULTS. ATTEMPED POWER TRANSFER GND TO APU AND APU TO GND AND COULD NOT RE-CREATE FAULT. ALSO OBSERVED VALVE LIGHT ANNUNCIATE AND EXTINGUISH WHEN TOGGLING COOLING SELECTOR FROM AUTO STBY. NEEDS FURTHER TROUBLE SHOOTING AND DEACTIVATED COOLING VALVES PER DDG 21-58-06 PROCEDURE 2. REPLACED EQUIP COOLING MODULATING VLV IAW AMM REF 21-61-06, OPS CKS GOOD.

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