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Atlas / NTSB / WPR11CA470

NTSB CAROL · Event

Event WPR11CA470

2011-09-28 Chandler, Arizona, United States Airport · CHD None 1 aircraft Status: Completed

Registry · N8056B

FAA Aircraft Registry record.

Make / Model

PIPER PA-28RT-201

Year of manufacture

1981 · 30 years old at event

Engine

LYCOMING I0360 SER A&C (200 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19811216

ADS-B equipped

Yes — Mode-S AAF79C

Registrant of record

CHANDLER AIR SERVICE INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The certified flight instructor's and pilot-undergoing-instruction's improper flare, which resulted in a hard landing.

Factual narrative

The certified flight instructor (CFI) submitted a written statement. He was preparing the commercial pilot-undergoing-instruction (PUI) for her CFI certificate. The purpose of the flight was to work on commercial-level takeoff and landing requirements. After departing, they entered the airport traffic pattern. While on the downwind leg of the traffic pattern, they completed the landing checklist but delayed the landing gear extension because they intended on conducting a 180-degree power off approach. On final approach as they were preparing to extend the landing gear, the air traffic control tower controller told them to conduct a go-around because the landing gear was not extended. They extended the landing gear and the CFI verified three green lights. He then requested permission to land and the tower controller cleared the airplane to land. As the airplane approached the runway, a high sink rate had developed. The CFI told the PUI to add power while simultaneously starting to move the throttle control forward. The CFI indicated that his hand slipped past the PUI's hand, and he reached again to push the throttle forward when the airplane touched down hard on the runway. They aborted the landing and after conducting a low approach to verify the position of the landing gear, they landed uneventfully. A post accident examination revealed rib damage to the left wing. The CFI reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. While on the downwind leg of the traffic pattern, the certified flight instructor (CFI) and pilot-undergoing-instruction (PUI) completed the landing checklist, but delayed the landing gear extension because they were conducting a 180-degree power-off approach. On final approach, as they were preparing to extend the landing gear, the air traffic controller told them to conduct a go-around because the landing gear was not extended. They extended the landing gear, and the CFI verified three green lights. He then requested permission to land and the tower controller cleared the airplane to land. As the airplane approached the runway, a high sink rate developed. The CFI told the PUI to add power, and the CFI simultaneously started to move the throttle control forward. The CFI said that his hand slipped past the PUI's hand, and he reached again to push the throttle forward when the airplane touched down hard on the runway. They aborted the landing, conducted a low approach to verify the position of the landing gear, and landed uneventfully. A postaccident examination revealed rib damage to the left wing. The CFI reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Descent/approach/glide path-Not attained/maintained - C
  • F Personnel issues-Psychological-Attention/monitoring-Task monitoring/vigilance-Instructor/check pilot - F
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Flight crew - C

Verbatim from NTSB's published report. Source file NTSB_2011_WPR11CA470.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (go-around). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗