# SDR ASAA2017050820688

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2017
- Submitted: May 11, 2017
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 31,635 hours, 9,475 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Transceiver
- Part number: 8222835002
- Part serial: 40DK78
- Condition: Intermittent
- Location: Satcom
- Part time: 15,530 hours, 4,554 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017050820688

## Discrepancy

NR 1 MCDU DID NOT HAVE SAT PROMPT. ACCOMPLISHED QRH FOR SAT LOCKUP. SAT WAS ON NR 2 MCDU BUT DIDN'T RETURN ON NR 1 MCDU FOR APPROXIMATELY 1 HOUR.  ACFT GROUNDED.  VERIFY SATCOM OPS NORMAL WITH PROMPT IAW AMM 23-15-00.  AS A RECAUTION, REMOVED AND REPLACED IRIDIUM TRANSCEIVER IAW AMM 23-15-00.  SATCOM COMMUNICATION OPS TEST NORMAL IAW AMM 23-15-00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.