20230214001719I

On 02/14/2023 at approximately 0910 EDT, a Cessna 525A operated under a verbal dry-lease, experienced ineffective braking during the landing roll out located at Muskegon County Airport (mkg). The aircraft came to a stop past the runway in the adjacent grass area southwest of the end of runway 14. No damage to the aircraft or injuries have been reported.

On 02/14/2023 a personal business flight originating from oakland county international airport (kptk) was operating in visual meteorological conditions en route to mkg. The reported weather data at mkg at 0855 EDT indicated wind from the south at 7 knots and visibility of 9 statute miles. The pilot stated weather conditions was “very good” and he set up for a runway 14 approach. The pilot stated “I flew final at vref and at 50’ closed the throttles and landed on the first 1,000’. I did not try for a “greaser” landing as I wanted to get the wheels on the ground as soon as possible so I would not need overly aggressive braking keeping in mind the anti-skid might be inop. Upon roll out, I eased into the brakes and sensed some slowing, but, less than I expected. I progressively increased brake pressure. The plane slowed, but, not as much as it should have. I believe the plane was slowing from aero drag as much as any brake response. About the last few hundred feet, it almost felt like whatever braking action I was getting went away. At this point I thought I was slow enough to make the turn off the runway on to the last taxi way with nose wheel steering, but, the nose wheel slid and we went off the end of the runway at about a 45 degree angle.” the pilot and passenger did not report any injuries and no damage was found at this time by the pilot or local maintenance. The aircraft was towed to a local maintenance facility for storage and further evaluation.

The aircraft was inspected for damage, however no damage has been found at this time. The Textron maintenance team is performing various inspections and maintenance actions to the affected components such as hard landing inspections, non-destructive testing, and replacement of landing gear with overhauled or new components. The maintenance team identified a failed control box related to the anti-skid braking system and replaced the component.

During the investigation conversations with the pilot and the regular maintenance team, the following items were found:

• During the initial conversation with the pilot, the pilot stated “the brake anti-skid amber light was illuminated prior to the flight.” the pilot statement stated the pilot informed the regular maintenance team of the illuminated anti-skid light, however the conversation between the pilot and the mechanic resulted in the pilot assuming the aircraft was acceptable for flight. The pilot stated he checked the brake operation during taxi and determined the aircraft was safe for the intended flight. The pilot stated there was no known minimum equipment list (MEL) for the aircraft.

• During the conversation with the regular maintenance team, the team stated a recurring issue of the braking anti-skid warning light illuminated on 01/17/2023 and 02/07/2023. The director of maintenance (dom) for the maintenance team stated the maintenance team never received a braking anti-skid warning light illuminated. The discrepancy dated 01/17/2023 could not be duplicated. A secondary discrepancy occurred on 02/07/2023, which the dom stated the fault identification unit showed a fault, however the anti-skid warning light was not illuminated. The dom stated Textron was contacted to help trouble-shoot the discrepancy. The dom stated they replace replaced the right landing gear transducer and performed an “ops check.” the work order corrective action stated “couldn’t get to fail.” the dom stated the maintenance team was unaware of a braking anti-skid warning light illuminated prior to flight. A compliance action has been initiated related to the pilot’s actions.