# SDR ASAA2020020393028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2020
- Submitted: February 6, 2020
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 24,939 hours, 8,005 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000141532
- Condition: Inoperative
- Location: Ram Air Exhaust
- Part time: 21,489 hours, 6,870 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020020393028

## Discrepancy

DURING CRUISE FLIGHT @FL340 RIGHT PACK LIGHT ILLUMINATED. ACCOMPLISHED PACK LIGHT QRH AND RIGHT PACK LIGHT EXTINGUISHED WITH HIGHER TEMP SELECTED & TRIP RESET (THE RIGHT PACK LIGHT DIDN'T EXTINGUISH WHEN MASTER CAUTION SYSTEM WAS PRESSED TO RESET INITIALLY). GROUNDED - YES. ACCOMPLISHED BITE CHECK OF #2 TEMP CONTROLLER AND HAD SRADA EXIT FAULT LIGHT ILLUMINATED PER B737-900 AMM 21-61-00. REMOVED AND REPLACED RH RAM AIR EXHAUST ACTUATOR. INSTALLATION TEST OK. REF AMM 21-51-27. ACCOMPLISHED BOTH PACK/ZONE TEMP CONTROLLER BITE WITH NO FAULTS REF AMM 21-61-00. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.

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