# SDR ASAA2023030242164

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2023
- Submitted: March 6, 2023
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 45,729 hours, 13,498 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Heat Exchanger
- Part number: 1828203
- Part serial: 16565
- Condition: Faulted
- Location: Rt Ecs Bay
- Part time: 45,794 hours, 13,526 cycles
- Stage of operation: NR
- 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/ASAA2023030242164

## Discrepancy

RH PACK EXCESSIVE TEMP IN FLIGHT, LH-RH PACK BAY NEEDS INSPECTION FOR POSSIBLE BLEED OR PACK LEAKS. GROUNDED - YES. PERFORMED BITE TEST OF R/H PACK TEMPERATURE CONTROLER (M14437) AND TORQUE CHECK OF THE RH PACK ACM REF B737-800 FIM 21-62 TASK 849. BITE TEST RESULTED IN A "THIS PACK- TCV" LIGHT ON BITE AND PREV FLT. DISPLAYED GREEN LIGHT ON VERIFY. REPLACED PRIMARY AND SECONDARY HEAT EXCHANGERS ON THE R/H PACK. REPLACED PRIMARY PLENUM AND DIFFUSER. REF B737-800 AMM 21-51-03-400-804-002. NO LEAKS NOTED.

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