Atlas / NTSB / OAK77FVM21

NTSB CAROL · Event

Event OAK77FVM21

1977-08-09 MORGAN HILL, California, United States None 1 aircraft Status: Completed

Registry · N55520

FAA Aircraft Registry record.

Make / Model

BOEING PT-13D

Year of manufacture

1942 · 35 years old at event

Engine

P&W R-985 SERIES (450 hp)

Seats / Engines

2 seats · 1 engine

ADS-B equipped

Yes — Mode-S A714B5

Registrant of record

RICH JEFFREY PIPER

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N55520 Boeing PT-13D None

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 PT-13D · N55520

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Takeoff — initial climb (C1)

Operator type

D

Airport

MORGAN HILL

Kind of flying

B0

Weather at impact

Sky

CLEAR

Wind

315° / 5 kt

Temp

60° F

Aircraft history

Serial number

0000075-5520

Pilot

Certificate

DA (DA)

Total hours

10,275

Age

43

Probable cause (from PRE1982.MDB)

SEALING MATERIAL BROKEN FROM ALTERNATE AIR DUCTING

Investigator remarks

CARB AIR RESTRICTION DUE INJESTION OF ASBESTOS

Cause factors

74/A/CL A
POWERPLANT RAM AIR ASSEMBLY Cause — pilot/personnel action
84/A/G A
MISCELLANEOUS FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS Cause — pilot/personnel action

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 3 2173. Source file NTSB_1977_3_2173.txt. Modern CAROL record on data.ntsb.gov ↗.

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