# SDR CALA2026050415936

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N667UA](https://openairdocs.org/aircraft/N667UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29239
- Aircraft time: 96,491 hours, 19,996 cycles
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Accelerometer
- Part number: 4040800916
- Part serial: 2175668
- Condition: Failed
- Location: Left
- Part time: 19,298 hours, 11,231 cycles
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026050415936

## Discrepancy

ON CLIMB OUT IAS  DISAREE...REPEAT WRITE UP. DEBRIEF WITH CREW,CREW STATED THAT THE IAS DIFFERENCE WAS 5 TO 10 KN FOR APPROXIMATELY 30 SECONDS. DURING PITOT PRESSURIZATION, FIRST OFFICER SIDE LAGS BEHIND CAPTAIN SIDE BUT STABILIZES AND HOLDS AT TARGET VALUE R & R CAPTAIN'S AOA SENSOR REF AMM 34-12-03 AS PRECAUTIONARY. OPS CHECK REQUIRED AS WELL AS SEALANT.  SENSOR, ANGLE  CONTINUED TROUBLESHOOTING, AND FOUND LEFT AIR DATA COMPUTER NOT TESTING, SWAPPED LT & RT ADC TO TEST, FAULT FOLLOWED. REMOVED AND REPLACED LEFT ADC IAW AMM 34-12-01.  PERFORMED OPS CHECK OF LEFT ADC, NO EXTERNAL FAULTS FOUND, REQUIRES TEST 30.  PITOT STATIC CHECK PER AMM 34-11-00 CONTINUES TO SHOW F/O'S AIRSPEED LAGGING THE CAPT'S WHILE INCREASING AND DECREASING AIRSPEED WITH A BIG LAG WHEN THERE IS A LARGE RATE OF CHANGE. PURGED PITOT LINES.

---
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.