# SDR HYIA20260422001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2026
- Submitted: April 22, 2026
- Operation: Air carrier
- Aircraft: [N4630N](https://openairdocs.org/aircraft/N4630N), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0001
- Aircraft time: 32,911 hours, 22,534 cycles
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Beam
- Part number: 56541097
- Condition: Cracked
- Location: Zone 400
- Part time: 32,911 hours, 22,534 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20260422001

## Discrepancy

DURING MAINTENANCE A CRACK WAS VISUALLY DISCOVERED ON THE INBOARD FACE OF THE RIGHT HAND INBOARD ENGINE BEAM IN THE AREA OF THE VERTICAL ATTACH CHANNELS FOR THE CROSSOVER BEAM. THIS CRACK WAS DISCOVERED AFTER CHANGING THE CROSSOVER BEAM VERTICAL ATTACH BRACKET P/N: 5654107-15 AND THEREFORE NOT VISIBLE UNTIL THE BRACKET WAS REMOVED.  THE CRACK MEASURES APPROXIMATELY 1.210 INCHES LONG, AND IS CONSISTENT WITH OTHERS FOUND IN THIS AREA USING A DETAILED VISUAL INSPECTION. THIS BEAM HAS BEEN REPLACED USING NEW PARTS.

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