# SDR 2025FA0000427

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2025
- Submitted: June 26, 2025
- Operation: General aviation
- Aircraft: [N4454R](https://openairdocs.org/aircraft/N4454R), registered now
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft serial: 17263196
- Aircraft time: 4,358 hours
- System (JASC): [7160 · Engine Air Intake System](https://openairdocs.org/jasc/7160)
- Part: Flapper Valve
- Part serial: NA
- Condition: Cracked
- Component: Airbox, Cessna
- Component part number: 055211313
- Stage of operation: AP
- How discovered: O
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000427

## Discrepancy

ON APPROACH CARBURETOR HEAT WAS APPLIED AND THE ENGINE IMMEDIATELY LOST POWER BUT DID NOT STOP RUNNING. THE PILOT ATTEMPTED TO DE-SELECT THE CARBURETOR HEAT AND THE LOSS OF POWER PERSISTED. THE AIRCRAFT WAS ABOUT 2300 FEET MSL AND 2 NM FROM THE RUNWAY. THE AIRCRAFT WAS ABLE TO GLIDE TO THE RUNWAY AND MAKE A SAFE LANDING. POST LANDING THE ENGINE STILL WOULD NOT MAKE POWER. INSPECTION OF THE CARBURETOR AIR BOX REVEALED THAT A PIECE OF THE AIRBOX FLAPPER AND FLANGE HAD BECOME DISLODGED AND OBSTRUCTED THE CARBURETOR INTAKE. SEVERAL LOOSE AND WORN RIVETS WERE DISCOVERED IN THE AIRBOX ASSEMBLY.

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