# Accident 20220410006089A: Parks Jerry R LANCAIR IV P, North Brookfiel, MA, April 10, 2022

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 10, 2022, 11:10 local time
- Place: North Brookfiel, MA
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 42.2764° N, 71.9307° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=42.2764&lon=-71.9307&mi=10
- Aircraft: N7KJ, registered now (https://openairdocs.org/aircraft/N7KJ) (OpenAirDocs)
- Registry model: Parks Jerry R LANCAIR IV P (registry code 05625WJ, https://openairdocs.org/model/parks-jerry-r-lancair-iv-p) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: PARKS JERRY R LANCAIR IV P
- Reported engine: AMA/EXPR UNKNOWN ENG
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 5,500 total
- NTSB investigation: [NTSB ERA22LA187](https://openairdocs.org/ntsb/ERA22LA187) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20220410006089A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE PILOT IN COMMAND WAS FLYING FROM KLEW TO KCRG AT FL165, WEATHER

CONDITIONS WERE VMC. CABIN PRESSURE DIFFERENTIAL WAS 4.9 PSI WITH A LIMIT

OF 5.1 PSI. IN THE VICINITY OF KBED, THERE WAS A LOUD POP, FOLLOWED BY

LOUD, COLD WIND. THE PIC OBSERVED THAT THE RIGHT/COPILOT WINDOW HAD

DEPARTED THE AIRCRAFT. AT THAT TIME, HE DECLARED AN EMERGENCY AND

DESCENDED TO 3000 FEET. THE PIC OBSERVED NORMAL CONTROL RESPONSES, AND

THAT THE INSTRUMENTS AND AVIONICS WERE FUNCTIONING NORMALLY. HE

INFORMED ATC THAT HE WOULD RETURN TO KLEW. HE RETURNED TO KLEW AND

LANDED WITHOUT INCIDENT.

THE PIC IS ^PRIVACY DATA OMITTED^. HE STATED THAT HE HAD ORDERED

REPLACEMENT WINDOWS FOR HIS AIRPLANE AFTER READING A REPORT OF AN

EXPLOSIVE DECOMPRESSION IN A DIFFERENT AIRPLANE OF THE SAME MODEL, AS THE

ACCIDENT AIRPLANE. THE PILOT, IN THE PREVIOUS ACCIDENT, FLEW THE AIRPLANE

BACK TO HOME BASE SAFELY. FOLLOWING THE DECOMPRESSION AND DEPARTURE OF

THE WINDOW FROM THE AIRPLANE, THE PIC DESCENDED TO A SAFE ALTITUDE,

CONDUCTED FLIGHT CONTROL, INSTRUMENT AND AVIONICS CHECKS PRIOR TO

DECIDING TO RETURN TO HIS HOME BASE, IN LIEU OF LANDING AT THE NEAREST

AIRPORT. AN ADDITIONAL SAFETY CONTROL MEASURE THAT HE HAD AVAILABLE WAS

AN AIRCRAFT PARACHUTE, THAT COULD BE USED IN THE CASE THAT THE AIRPLANE

WAS NO LONGER AIRWORTHY OR CONTROLLABLE. THE PIC'S JUDGEMENT AND ACTIONS

WERE APPROPRIATE AND SAFE. I RECOMMEND NO ACTION.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ERA22LA187](https://openairdocs.org/ntsb/ERA22LA187), Apr 10, 2022: Lancair IV (N7KJ), Leicester, MA, substantial damage. Probable cause: A separation of the window from the airframe for undetermined reasons.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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