# SDR ASAA2020021132160

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2020
- Submitted: February 13, 2020
- Operation: Air carrier
- Aircraft: [N408AS](https://openairdocs.org/aircraft/N408AS), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 41732
- Aircraft time: 28,697 hours, 9,233 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Part number: 32022221
- Part serial: 15106
- Condition: Binding
- Location: Nr 1 Engine
- Part time: 28,695 hours, 9,231 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020021132160

## Discrepancy

ENGINE #1 DURING ENGINE START, ENGINE REACHED N2 44% - N1 11%, THEN N1 AND N2 ROLLED BACK WITH EGT DROP JUST PRIOR TO STARTER CUTOUT. EGT BOX WAS FLASHING WHITE DURING EVENT. GROUNDED - YES. PERFORMED B737-900 FIM 80-05 TASK 801, NO EXCEEDANCES OF EGT. PERFORMED EEC BITE PROCEDURE REF FIM 73-00 TASK 801, NO MAINT MESSAGES. PERFORMED BLEED AIR CHECK VALVE INSPECTION REF B737-800 AMM 36-11-02, FOUND FLAPPER PLATES BINDING. REMOVED AND REPLACED BLEED AIR CHECK VALVE REF AMM 36-11-02, LEACK CHECK GOOD. PERFORMED 2 SUCCESSFUL ENGINE STARTS.

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