# SDR DL73K990875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N315DL](https://openairdocs.org/aircraft/N315DL), registered now
- Make and model: Boeing 737232
- Aircraft serial: 23087
- System (JASC): [2350 · Audio Integrating System](https://openairdocs.org/jasc/2350)
- Part: Microphone
- Part number: 63999004
- Condition: Malfunctioned
- Location: Lt Cockpit
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL73K990875

## Discrepancy

DURING CLIMB-OUT, LOST ALL RADIOS, BOTH TRANSMIT AND RECIEVE FOR ABOUT 2 MIN, THEN THEY CAME BACK ON, THEN WENT OUT AGAIN.  REPEATED THIS CYCLE ABOUT 4 TIMES.  RETURNED TO MCO.  ALL RADIOS OPERATE NORMAL AT GATE.  CAPT SUSPECT CAPT HANDMIC.  REPLACED SAME.  REPLACED NR 1 VHF TRANCEIVER AND NR 2 AUDIO SELECT PANEL AS PRECAUTION.  ALL RADIOS CK OK.  PART NR HAND MIC- 63999-004 SERIAL NR 9206, TRANSCIEVER 064-1005-02 SERIAL NR 3960, AUDIO SEL PNL G6560 SERIAL NR 34.

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