# SDR HEEA071976

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2001
- Submitted: April 18, 2001
- Operation: General aviation
- Aircraft: N142PH
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- Aircraft serial: 33150
- Aircraft time: 4,765 hours
- System (JASC): [2312 · VHF Communications System](https://openairdocs.org/jasc/2312)
- Part: Transceiver
- Part number: 064102300
- Part serial: 1903
- Condition: Weak
- Location: Cockpit
- 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/HEEA071976

## Discrepancy

TRANSMITS UNREADABLE. PERFORMED PRELIMINARY INSPECTION AND TESTED.  FOUND MODULATION VERY WEAK.  ADJUSTED MIC GAIN, TRANSMIT POWER, AND SIDETONE.  FOUND MODULATION WOULD BECOME DISTORTED AFTER KEYED UP A FEW TIMES.  REPLACED Q109 AND Q110 MODULATORS.  REPAIRED.  REMOVED CORROSION FROM CHASSIS.  BENCH CHECK GOOD.

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