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Atlas / NTSB / LAX95LA039

NTSB CAROL · Event

Event LAX95LA039

1994-11-22 HONOLULU, Hawaii, United States Airport · HNL Minor 1 aircraft Status: Completed

Registry · N31MK

FAA Aircraft Registry record.

Make / Model

CIRRUS DESIGN SR22T

Year of manufacture

2023

Engine

CONT MOTOR TSIO-550-K (315 hp)

Seats / Engines

5 seats · 1 engine

Last airworthiness date

20231217

ADS-B equipped

Yes — Mode-S A34595

Registrant of record

TURBONIUM LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

the student pilot's improper use of the collective and throttle controls and his failure to maintain adequate main rotor rpm during a practice autorotation.

Factual narrative

On November 22, 1994, at 1330 Hawaii standard time, a Robinson R22B helicopter, N31MK, collided with the ground at the Honolulu International Airport, Honolulu, Hawaii, while performing a practice autorotation. The aircraft was owned and operated by Rainbow Pacific Helicopters, Ltd., of Honolulu, Hawaii, and was engaged in a private pilot practical flight test with a designated examiner on board. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft incurred substantial damage. The private pilot applicant and the examiner sustained minor injuries. The flight originated at the Honolulu International Airport on the day of the accident at 1230 as a local area flight. According to a written statement from the examiner, the applicant completed the first part of the practical test satisfactorily. The last maneuver to be performed was a recovery from a 180-degree autorotation. The applicant entered the maneuver satisfactorily; however, at the bottom had allowed the main rotor rpm to decay and began to add collective input without adequate throttle input. The examiner said he took control of the helicopter, but could not regain main rotor rpm prior to ground impact. THE STUDENT PILOT WAS TAKING A PRIVATE PILOT PRACTICAL FLIGHT TEST WITH A DESIGNATED EXAMINER ON BOARD. ACCORDING TO THE EXAMINER, THE APPLICANT COMPLETED THE FIRST PART OF THE PRACTICAL TEST SATISFACTORILY. THE LAST MANEUVER TO BE PERFORMED WAS A RECOVERY FROM A 180-DEGREE AUTOROTATION. THE APPLICANT ENTERED THE MANEUVER SATISFACTORILY; HOWEVER, AT THE BOTTOM HAD ALLOWED THE MAIN ROTOR RPM TO DECAY AND BEGAN TO ADD COLLECTIVE INPUT WITHOUT ADEQUATE THROTTLE INPUT. THE EXAMINER SAID HE TOOK CONTROL OF THE HELICOPTER, BUT COULD NOT REGAIN MAIN ROTOR RPM PRIOR TO GROUND IMPACT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1994_LAX95LA039.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.