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Atlas / NTSB / NYC90LA228

NTSB CAROL · Event

Event NYC90LA228

1990-09-23 FRANCONIA, New Hampshire, United States Airport · 1B5 Minor 1 aircraft Status: Completed

Registry · N2770M

FAA Aircraft Registry record.

Make / Model

PIPER PA-12

Year of manufacture

1946 · 44 years old at event

Engine

LYCOMING 0-235 SERIES (115 hp)

Seats / Engines

3 seats · 1 engine

Last airworthiness date

19551111

ADS-B equipped

Yes — Mode-S A2C2E1

Registrant of record

THISSELL DAVID W

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

THE LANDING OF THE AIRPLANE IN UNSUITABLE TERRAIN, DUE TO THE MECHANICAL FAILURE OF THE ENGINE CENTER MUFFLER BAFFLE, WHICH BLOCKED THE EXHAUST FLOW, RESULTING IN A LOSS OF POWER.

Factual narrative

THE AIRPLANE WAS ON A SIGHTSEEING TRIP CRUISING AT 1500' WHEN, ACCORDING TO THE PILOT, 'A BACKFIRE WAS HEARD AND THE AIRCRAFT EXPERIENCED PARTIAL POWER LOSS. SUFFICIENT POWER WAS NOT AVAILABLE FOR CONTINUED FLIGHT. AN EMERGENCY LANDING WAS MADE IN THE TREES.' A MAINTENANCE FACILITY EXAMINED THE ENGINE AND FOUND THE CENTER MUFFLER BAFFLE HAD BROKEN LOOSE AND HAD BLOCKED THE EXHAUST FLOW. THIS RESULTED IN A PARTIAL LOSS OF ENGINE POWER. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1990_NYC90LA228.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 (maintenance). 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 ↗