NTSB CAROL · Event
Event NYC91FA006
Aircraft involved
Probable cause & findings
A BROKEN EHAUST VALVE SPRING THAT RESULTED IN A PARTIAL LOSS OF POWER. FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS, LACK OF SUITABLE TERRAIN, AND FAILURE OF THE OCCUPANTS TO USE THEIR SHOULDER HARNESSES.
Factual narrative
THE PLT & PSGR WERE ON A LOCAL FLT AT NGT. PSNL AT THE ARPT NOTED THAT THE RWY LIGHTS HAD BEEN ACTIVATED, BUT NO ACFT WAS SEEN TO LAND. THE ACFT WAS FND THE NEXT MORNING ABOUT 6 MI NORTHEAST OF THE ARPT, WHERE IT HAD HIT TREES & CRASHED. AN INVESTIGATION REVEALED IT HAD IMPACTED TREES, WHILE IN A SHALLOW DSCNT. A LACK OF ROTATIONAL SCARRING WAS NOTED ON THE PROP; ONLY 1 BLADE WAS DEFORMED & ONLY 1 BLADE CONTAINED LEADING EDGE NICKS. THE FLAPS WERE FND IN THE FULLY EXTENDED (30 DEG) POSITION, BUT THE FLAP INDICATOR SHOWED ONLY 10 DEGS OF FLAPS. ABOUT 8 GAL OF FUEL WAS FOUND IN EACH WING TANK. A CHECK OF THE ENG REVEALED A LACK OF COMPRESSION IN THE #3 CYLINDER DUE TO A BROKEN EXHAUST VALVE SPRING. NO OTHER PRE-ACDNT ANOMALIES WERE FND. THE PLT & PSGR WERE NOT WEARING THEIR AVAILABLE SHOULDER HARNESSES. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1990_NYC91FA006.txt.
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- NASA NTRS 2021 · Poster
Sleep, Sleepiness, and Performance Across Three In-Flight Bunk Rest Opportunities
Introduction: Airline pilots are required to take a rest break in a bunk during long-haul flights in an effort to reduce sleepiness during critical phases of flight.
- Semantic Scholar 2020 · Article (Research in Social and Administrative Pharmacy)
Routine opioid outcome monitoring in community pharmacy: Outcomes from an open-label single-arm implementation-effectiveness pilot study.
BACKGROUND In response to rising harms with prescription opioids, recent attention has focused on how to better utilise community pharmacists to monitor outcomes with opioid medicines.
- Embry-Riddle Scholarly Commons 2011 · Journal article (JAAER)
System Safety Study: Pedagogical Aviation Action Research
Action Research (AR) is a scientific methodology whereby researchers participate in a research setting for data collection and problem resolution.
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