# SDR ASAA2021091735972

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2021
- Submitted: September 20, 2021
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 50,343 hours, 15,169 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 2645
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 69,317 hours, 36,622 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021091735972

## Discrepancy

AFTER ENGINE START RIGHT PACK LIGHT ILLUMINATED WENT OUT WITH MASTER RECALL. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-53 TASK 820. FOUND TCV FAULT. REMOVED AND INSTALLED NEW RIGHT TCV PER B737-800 AMM 21-51-10/401, INSTALLATION TEST PASSED. NO FAULTS FOUND. GROUND VERIFICATION SUCCESSFUL.

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