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WPR11CA112

2011-01-28 · Buckeye, Arizona, United States · Minor · 1 aircraft · Status: Completed

Airport BXK

Current FAA registration · N8053R

Make / Model
RANS S-6ES
Year of manufacture
2007 · 4 years old at event
Engine
JABIRU 3300A (120 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20180310
ADS-B equipped
Yes — Mode-S AAF741

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

A disconnection of the elevator control linkage due to incorrect installation or maintenance, which was due to the retaining nut backing off the bolt and allowing the bolt to fall out.

Factual narrative

While in cruise flight the pilot realized he had lost elevator control. The pilot attempted to determine if there was any way to re-establish elevator control but was unsuccessful. He was able to maintain pitch control by increasing or decreasing engine power. During a precautionary landing the airplane was damaged when it impacted the runway hard and damaged the firewall. On scene inspection of the aircraft’s elevator control system by an FAA Airworthiness Inspector revealed the bolt that connects the aft elevator push pull control tube to the pilot and copilot's control stick bellcrank was missing, and was not found during a thorough inspection of the area. In addition, the bolt that connects the forward push pull tube to the control stick bellcrank was ready to fall out. These bolts are an AN type drilled shank bolt requiring a castellated nut and cotter pin for security. Neither of the nuts or cotter pins were found. The aircraft has 197 hours total time. The last condition inspection was performed 2 months and 24 operating hours prior to the accident. It could not be determined if the cotter pin had ever been installed. While in cruise flight the pilot realized that he had lost elevator control. The pilot attempted to determine if there was any way to reestablish elevator control but was unsuccessful. He was able to maintain pitch control by increasing or decreasing engine power. During a precautionary landing the airplane impacted the runway hard and sustained substantial damage to the firewall. On-scene inspection of the aircraft’s elevator control system revealed that the bolt that connects the aft elevator push-pull control tube to the pilot and copilot's control stick bellcrank was missing, and was not found during a thorough inspection of the area. In addition, the bolt that connects the forward push-pull tube to the control stick bellcrank was ready to fall out. These bolts are an AN-type drilled shank bolt requiring a castellated nut and cotter pin for security. Neither of the nuts or cotter pins were found. The aircraft had 197 hours total time. The last condition inspection was performed 2 months and 24 operating hours prior to the accident. It could not be determined if the cotter pin had ever been installed. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Aircraft-Aircraft systems-Flight control system-Elevator control system-Malfunction - C

Verbatim from NTSB's published report. Source file NTSB_2011_WPR11CA112.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (stall, maintenance). All research papers