# SDR ASAA2018102926628

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2018
- Submitted: October 29, 2018
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 44,619 hours, 13,285 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Plenum
- Part number: 22156322
- Condition: Failed
- Location: Ac Bay
- 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/ASAA2018102926628

## Discrepancy

RT SECONDARY HEAT EXCHANGER PLENUM FAILED DURING HEAT EXCHANGER WASH T/C 78121000. GROUNDED - YES. REMOVED SECONDARY HEAT EXCHANGER ASSEMBLY AND REPLACED PLENUM REF AMM 21-51-03. INSTALLED RT PRIMARY & SECONDARY HEAT EXCHANGERS & PLENUM DIFFUSERS REF AMM 21-51-03-400-804-002.

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