# SDR UIEA2019020803156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2019
- Submitted: February 8, 2019
- Operation: Air carrier
- Aircraft: [N1399A](https://openairdocs.org/aircraft/N1399A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27959
- Aircraft time: 88,198 hours, 16,618 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 21428
- Part serial: N1030
- Condition: No Test
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019020803156

## Discrepancy

WHILE PERFORMING HMG OPS CHECK, HMG DID NOT DEVELOP A HIGH ENOUGH FREQUENCY, WORKING AT 391 CYCLES. SHOULD BE A MIN OF 395 CYCLES. (<P>REPLACED HMG CONTROL GENERATOR MOTOR IAW AMM 24-25-02. OPS CHECK NORMAL, 399 FREQUENCY. </P>)

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