# SDR 2024FA0000475

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2024
- Submitted: June 25, 2024
- Operation: General aviation
- Aircraft: [N43CU](https://openairdocs.org/aircraft/N43CU), registered now
- Make and model: Boeing CH47A
- Aircraft serial: 900182
- Aircraft time: 8,715 hours, 2,215 cycles
- System (JASC): [6700 · Rotorcraft Flight Control](https://openairdocs.org/jasc/6700)
- Part: Link
- Part number: 145C14151
- Part serial: NOSN
- Condition: Corroded
- Location: Pallet Links
- Stage of operation: IN
- How discovered: B
- Nature of condition: F
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2024FA0000475

## Discrepancy

DURING RIG OF FLIGHT CONTROLS NOTED OBSTRUCTION IN ROD-END THREAD. PERFORMED BORESCOPE AND FOUND HEAVY CORROSION IN THREADS. THIS IS CONCURRENT WITH CORROSION FOUND IN OTHER FLIGHT CONTROLS ON SAME AIRCRAFT THAT REQUIRED INSPECTION THROUGH BOEING SB'S 145-67-1046 R2AND145-67-1047, AS WELL AS NUMEROUS MILITARY MESSAGES. THOSE FLIGHT CONTROLS ARE IN DISCUSSION WITH FAA FOR POTENTIAL EMERGENCY AD. THE LINKS IN THIS SDR ARE NOT LISTED IN THE ABOVE SERVICE BULLETINS, THERE ARE 27 LINKS POTENTIALLY AFFECTED. THIS SDR IS ONE OF12SDRS ON N43CU. THESE LINKS ARE NOT SERIALIZED AND HAVE NO TOTAL TIME, TOTAL CYCLES OR TIME SINCE. MARKED 0 DUE TO FORM SUBMISSION REQUIREMENTS.

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