# SDR SWAA2024120473111

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2024
- Submitted: December 4, 2024
- Operation: Air carrier
- Aircraft: [N486WN](https://openairdocs.org/aircraft/N486WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33852
- Aircraft time: 66,569 hours, 39,931 cycles
- System (JASC): [2410 · Alternator-Generator Drive](https://openairdocs.org/jasc/2410)
- Part: Idg
- Condition: Slow
- Location: Zn 400 Nacelle/P
- Stage of operation: DE
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2024120473111

## Discrepancy

N1 & N2 SLOW TO REDUCE BELOW 45% N1 WHEN RETARDING THRUST LEVER. TAKES APPROX 30 SECS TO REDUCE TO IDLE. ( #1 ENGINE )<[01] R&R #1 ENG IDG PER [AMM 24-11-11-401-NG (INTEGRATED DRIVE GENERATOR (IDG) - REMOVAL/INSTALLATION - PERMANENT)]. NO HELP.;[02] R&R #1 ENG HMU PER [AMM 73-21-10-401-NG (HYDROMECHANICAL UNIT - REMOVAL/INSTALLATION - PERMANENT)] AND #1 ENG FUEL PUMP PER AMM 73-11-01. OPS CHECK GOOD.;[03] C/W CA #2 RII OF HMU R&R;[04] R&R #1 ENG HMU PER [AMM 73-21-10-401-NG (HYDROMECHANICAL UNIT - REMOVAL/INSTALLATION - PERMANENT)] AND #1 ENG FUEL PUMP PER AMM 73-11-01. OPS CHECK GOOD.

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