# SDR ASAA2021041334579

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 13, 2021
- Submitted: April 15, 2021
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 21,416 hours, 6,894 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Heater
- Condition: Inoperative
- Location: Pitot Tube
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021041334579

## Discrepancy

CAPT PITOT STAYED ILLUMINATED. GROUNDED - YES. ON INITIAL EVALUATION THE CAPT PITOT LIGHT WAS ON WHILE SWITCH WAS IN THE ON POSITION. C/W B737-900 FIM 30-31 TASK 802 THROUGH STEP E. LIGHT REMAINED ON, C/B'S NOT POPPED, AND CAPT FWD PITOT TUBE IS COLD TO THE TOUCH WHILE SWITCH IS ON. REMOVED AND REPLACED CAPT'S PITOT TUBE REF B737-900 AMM 34-11-01, PERFORMED OPS CHECK REF SAME, NO FAULTS NOTED. PERFORMED LEAK TEST REF AMM 34-11-00, NO FAULTS NOTED.

---
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.