DCA96MA008

NTSB accident investigation · McDonnell Douglas MD-83 · East Granby, CT · November 12, 1995

Accident · Minor injuriesClass 1 · MajorFinal report
Date
November 12, 1995, 00:55 local (05:55 UTC)
Place
East Granby, CT
Injuries
1 minor, 77 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N566AAMcDonnell Douglas MD-83
Weather
Instrument (IMC) · Night/dark
Status
Completed · report May 23, 1997
Report
Board-adopted at Board Meeting
Investigation class
Class 1
NTSB office
Major Investigations Division
Safety recommendations
Yes
FAA report
19951112036309A
Case key
11007

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

the flightcrew's failure to maintain the required minimum descent altitude until the required visual references identifiable with the runway were in sight. Contributing factors were the failure of the BDL approach controller to furnish the flightcrew with a current altimeter setting, and the flightcrew's failure to ask for a more current setting. (NTSB Report AAR-96/05 adopted 11/13/96)

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

UndershootApproach - faf/outer marker to threshold (ifr)
Light condition - dark night
Weather condition - rain
Weather condition - high wind
Weather condition - gusts
Approach/departure control service - inadequateAtc personnel(dep/apch)Factor
Altimeter setting - not obtainedFlightcrewFactor
Minimum descent altitude - belowFlightcrewCause
In flight collision with objectApproach - faf/outer marker to threshold (ifr)
Object - tree(s)
Object - antenna

Analysis

The airplane impacted trees, then an ILS antenna as it landed short of the runway on grass, even terrain during a night VOR approach in strong, gusty wind conditions. At the time of the accident, the indicated altitude (height above airport elevation) that the airplane's QFE altimeter was indicating was about 76 feet too high (based on the altimeter setting received at 0030), resulting in the airplane being 76 feet lower than indicated on the primary altimeters. Because the flightcrew knew that the atmospheric pressure was falling rapidly, they should have requested a current altimeter setting from the approach controller when was not given, as required, upon initial radio contact. Although the flightcrew did not use the most current QNH setting they had available (29.40 inches of Hg.) in the standby altimeter, this error did not affect the accident sequence of events because the flightcrew had the correct, but outdated, QFE setting (29.23 inches Hg.) in the altimeters they were using when the accident occurred. If the first officer had monitored the approach on instruments until reaching minimum descent altitude (MDA) and delayed his search for the airport until after reaching the MDA, he would have been better able to notice and immediately call the captain's attention to the altitude deviation below the MDA.

Factual narrative

On November 12, 1995, at 0057 est, an American Airlines McDonnell Douglas MD-80, registered in the US as N566AA, struck trees on a ridge line 2.65 miles from the end of runway 15 at Bradley International Airport, Windsor Locks, CT. The airplane then landed safely at the airport. One of the 72 passengers received a minor injury during the emergency evacuation. None of the 5 crewmembers were injured. The flight was operating under CFR Part 121 in instrument meteorological conditions. It originated at O'Hare International Airport about two hours before the accident. See NTSB/AAR-96/05 for details.

Aircraft

Registration
N566AA
Reported as
McDonnell Douglas MD-83
Category
Airplane
Serial number
49348
Engine
P&W JT8D-219, 21,000 lbs thrust, turbo fan
Damage
Substantial damage
Fire
In-Flight
Flight
Part 121
Registered owner
American Airlines Inc
Airworthiness certificate
Standard, Transport
Departed
ORD · Chicago, IL
Destination
BDL · Windsor Locks, CT
Flight plan
IFR
Airport
BDL · Bradley International, runway 15, 6,846 × 150 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
39
Certificates
Commercial, Airline transport, Flight engineer, Military
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
8,000 total · 4,200 in this make and model · 55 in the last 90 days · 20 in the last 30 days · 10 in the last 24 hours
Role
Co-pilot
Age
38
Injuries
None
Certificates
Commercial, Airline transport, Flight engineer
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
August 19, 1995
Seat
Right
Flight hours
5,100 total · 167 in the last 90 days · 60 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
170° at 25 knots
Visibility
3 statute miles
Lowest ceiling
2,800 ft overcast
Temperature
61 °F, dew point 55 °F
Altimeter
29.00 inHg
Observed at
BDL, 3 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.