# SDR ASAA2018041424239

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2018
- Submitted: April 18, 2018
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 38,599 hours, 11,647 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Diffuser
- Part number: 22156283
- Condition: Unserviceable
- Location: Rt A/C Pack
- Stage of operation: IN
- 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/ASAA2018041424239

## Discrepancy

RIGHT AFT PRIMARY HEAT EXCHANGER PLENUM UNSERVICEABLE.  ACFT GROUNDED.  REMOVED RIGHT AFT PRIMARY HEAT EXCHANGER AND PLENUM/DIFFUSER ASSY IAW AMM 21-51-03-000-805-002. INSTALLED A SERVICEABLE PLENUM/DIFUSSER ASSY, AND PRIMARY HEAT EXCHANGER IAW AMM 21-51-03, LEAK CHECKED GOOD.

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