What was found
ON TAKEOFF CLIMB PRESS FLUCTUATIONS UP TO 4300 ON THE RATE AND BACK DOWN AND BACK UP AGIN ACCOMPANIED WITH A ACM OVERHEAT: REMOVED AND REPLACED LH BILEVEL VALVE IAW AMM 21-11-00. OPS & LEAK CHECKED GOOD.
- Difficulty date
- April 12, 2026
- Submitted
- July 13, 2026
- Operation
- Air carrier
- Aircraft
- N835JS
- Make and model
- Cessna 560XL
- Aircraft serial
- 5605813
- Aircraft time
- 9,210 hours, 5,705 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Valve
- Part number
- 1988003
- Part serial
- 2815
- Condition
- Failed
- Location
- Zone 200
- Part time
- 348 hours, 198 cycles
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.