Skip to content

Atlas / NTSB / MIA89LA229

NTSB CAROL · Event

Event MIA89LA229

1989-08-23 PONCE, Puerto Rico Airport · PSE None 1 aircraft Status: Completed

Registry · N955B

FAA Aircraft Registry record.

Make / Model

BELL 47G

Year of manufacture

1954 · 35 years old at event

TCDS

H-1 · SCOTT'S-BELL 47 INC

Engine

LYCOMING VO-435-A1F (250 hp)

Seats / Engines

3 seats · 1 engine

Last airworthiness date

20170112

ADS-B equipped

Yes — Mode-S AD4753

Registrant of record

LAMBERT BRIAN J

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

FAILURE OF THE AFT TAIL ROTOR DRIVE SHAFT.

Factual narrative

THE STUDENT PLT WAS ON AN APCH TO LAND ON A X-COUNTRY FLT, WHEN THE AFT TAIL ROTOR DRIVE SHAFT (PN: 47-644-187) FAILED AT ABOUT 40' AGL. HE RPRTD THE HELICOPTER BEGAN TO SPIN TO THE RIGHT, SO HE CLOSED THE THROTTLE & THE SPINNING STOPPED. HE PULLED UP ON THE COLLECTIVE TO CUSHION THE LANDING, BUT RAN OUT OF COLLECTIVE PITCH AT ABOUT 10' ABOVE THE GROUND. SUBSEQUENTLY, THE HELICOPTER TOUCHED DOWN HARD, DAMAGING THE TAIL ROTOR & TAIL BOOM. THE TAIL ROTOR DRIVE SHAFT HAD FAILED JUST FORWARD OF THE 90 DEG GEAR BOX. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_MIA89LA229.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.