# SDR FDEA202604160456 - Type: Service difficulty report (as reported; unverified) - Difficulty date: April 16, 2026 - Submitted: April 17, 2026 - Operation: Air carrier - Aircraft: [N968FD](https://openairdocs.org/aircraft/N968FD), registered now - Make and model: Boeing 757-28A - Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs) - Aircraft serial: 26274 - Aircraft time: 79,557 hours, 24,678 cycles - System (JASC): [2730 ยท Elevator Control System](https://openairdocs.org/jasc/2730) - Part: Control Cable - Condition: Out Of Adjust - Location: Zone 100 - Stage of operation: CR - How discovered: C - Nature of condition: E - Precautionary procedure: A - FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/) - Page: https://openairdocs.org/sdr/FDEA202604160456 ## Discrepancy EXPERIENCED EXTREME UNCOMMANDED PITCH OSCILLATIONS ON CLIMB OUT BETWEEN 3 AND 4 THOUSAND FEET. OSCILLATIONS LASTED 10 TO 15 SECONDS. AIR CRAFT CLEAN CONFIGURATION ACCELERATING TO 250 KNOTS. ENGAGED CENTER AUTOPILOT AND OSCILLATIONS CEASED. MULTIPLE HAND FLOWN SEGMENTS BY BOTH PILOTS WITH NO OSCILLATIONS. TURNED BACK TO MEMPHIS AND HELD TO BURN FUEL. WHILE USING CENTER AUTOPILOT ON APPROACH WHILE CONFIGURING AND SLOWING AUTOPILOT DISENGAGED. CAPTAIN THEN BEGAN HAND FLYING AND NOTICED SIGNIFICANT TRIM DOWN FROM AIRPLANE. APPROACH AND LANDING UNEVENTFUL. UPON DEBRIEF DISCUSSED THE FLIGHT CONTROL CHECK THE PITCH FELT LIGHT WITHIN ONE INCH OF NEUTRAL. EMERGENCY DECLARED. AMM 27-31-00-5 REF MTSI 27-30/1349 FOR RIGHT SIDE FUSELAGE BODY CABLE ADJUSTMENTS AND OPS CHKD. NO FAULTS NOTED AFTER ADJUSTMENT. OK FOR SERVICE.AMM 27-31-00-5 REF MTSI 27-30/1349 FOR RIGHT SIDE FUSELAGE BODY CABLE ADJUSTMENT S AND OPS CK S. NO FAULTS NOTED AFTER ADJUSTMENT. OK FOR SERVICE. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.