NTSB CAROL · Event
Event DCA79AA016
Registry · N840TW
FAA Aircraft Registry record.
Make / Model
ROCKWELL INTERNATIONAL 690C
Year of manufacture
1981
Engine
AIRESEARCH TPE331-5&6SER (776 hp)
Seats / Engines
11 seats · 2 engines
Last airworthiness date
19810910
ADS-B equipped
Yes — Mode-S AB8197
Registrant of record
NEPTUNE AVIATION SERVICES INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Historical record (pre-1982)
NTSB recorded this accident in the pre-1982 coded-field schema — structured fields rather than free-text narrative. Decoded codes use established NTSB single-letter taxonomies; cause factors remain verbatim pending the Form 6120.4 codebook lookup.
Aircraft
BOEING 727-31 · N840TW
Damage
Substantial
Craft type
Airplane
Classification
Accident
Light condition
E
Weather
IMC
Phase of flight
D9
Airport
DETROIT METRO
Weather at impact
Sky
OVERCAST
Wind
230° / 85 kt
Temp
-49° F
Aircraft history
Serial number
Z
Total time
35,412 hrs
Pilot
Certificate
DA (DA)
Total hours
15,710
Age
44
Probable cause (from PRE1982.MDB)
FULLY RETRACT,RESULTING IN ASYMMETRICAL SLATS.
Investigator remarks
LE SLATS EXTENDED.NR7 SLAT DID NOT SUBSEQUENTLY
Cause factors
- 64/C/71 C PILOT IN COMMAND MISUSED OR FAILED TO USE FLAPS Cause
- 64/C/23 C PILOT IN COMMAND IMPROPER OPERATION OF FLIGHT CONTROLS Cause
- 64/L/08 L PILOT IN COMMAND DIVERTED ATTENTION FROM OPERATION OF AIRCRAFT
- 70/L/D6 L AIRFRAME SPOILERS AND SLOTS-LEADING EDGE FLAPS,SPEED BRAKES
- 88/L/47 L MISCELLANEOUS ACTS,CONDITIONS IMPROPER ALIGNMENT/ADJUSTMENT
- 88/L/53 L MISCELLANEOUS ACTS,CONDITIONS ASYMETRICAL FLAPS
- 88/K/49 K MISCELLANEOUS ACTS,CONDITIONS SEPARATION IN FLIGHT Joint factor
Decoded against the NTSB Form 6120.4 cause-factor codebook (ct_Pre1982 table). Each row shows the raw triplet, modifier (Cause / Factor / etc.), category, and specific code.
Source: NTSB pre-1982 historical archive. Docket
1 0022.
Source file
NTSB_1979_1_0022.txt.
Modern CAROL record on
data.ntsb.gov ↗.
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