# Incident 20211026018179I: Cessna 550, Battle Creek, MI, October 26, 2021

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: October 26, 2021, 14:41 local time
- Place: Battle Creek, MI
- Airport: Battle Creek Exec At Kellogg F
- Damage: No damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: General operating rules (Part 91)
- Location: 42.3065° N, 85.2501° W: Placed by OpenAirDocs at BATTLE CREEK EXEC AT KELLOGG FLD (BTL), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.3065&lon=-85.2501&mi=10
- Aircraft: N5852K, registered now (https://openairdocs.org/aircraft/N5852K) (OpenAirDocs)
- Registry model: Cessna 550 (registry code 2076604, https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Registry engine: Pratt & Whitney Canada 530A (registry code 52153, https://openairdocs.org/engine/pratt-whitney-canada-530a) (OpenAirDocs)
- Reported make and model: CESSNA 550
- Reported engine: P&W CANADA 530A
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 10,900 total
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20211026018179I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON 10/26/2021 AT APPROXIMATELY 1441 EDT, THE CREW OF N5852K DECLARED AN EMERGENCY FOR A LANDING GEAR MALFUNCTION AND THE AIRCRAFT SAFELY LANDED AT BATTLE CREEK AIRPORT (BTL). THE INCIDENT FOLLOWS THE OCCURRENCE DATED 10/19/2021 (OGL0920210066) WITH SIMILAR INFORMATION REGARDING AN UNSCHEDULED LANDING REQUIRED BECAUSE OF LANDING GEAR/HYDRAULIC ISSUES.

THE MAINTENANCE FACILITY DETERMINED THE ORIGINAL ISSUE TO BE A FAULTY HYDRAULIC DUMP VALVE AND SUBSEQUENTLY REPLACED IT, WHICH WAS LATER DETERMINED TO BE AN INCORRECT DIAGNOSIS. ON THIS FLIGHT, THE CREW EXPERIENCED A MALFUNCTION WITH THE HYDRAULIC LANDING GEAR AND RETURNED TO THE AIRPORT. THE MAINTENANCE FACILITY PERFORMED TROUBLESHOOTING AND FOUND THAT THEIR TECHNICIAN HAD INDUCED THE FAULT BY PERFORMING A PROCEDURE TO CLEAN THE PNEUMATIC LINES THAT WAS NOT SPECIFIED IN THE AIRCRAFT MAINTENANCE MANUAL. THE UNAUTHORIZED PROCEDURE SHIFTED THE SHUTTLE VALVES AND CAUSED THE LANDING GEAR FAULT. IT WAS DETERMINED THE TECHNICIAN PERFORMED THE FAULTY PROCEDURE TWICE, PRIOR TO THE OCCURRENCE AND PRIOR TO THE INCIDENT.

AS A PRECAUTIONARY MAINTENANCE ACTION, BOTH LANDING GEAR SHUTTLE VALVES FOR THE HYDRAULIC SYSTEM WERE REPLACED WITH OVERHAULED COMPONENTS AND THE AIRCRAFT RETURNED TO SERVICE.

THE MAINTENANCE FACILITY HAS FILED A REPORT UNDER THE VOLUNTARY DISCLOSURE REPORTING PROGRAM.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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