# Incident 20220624008069I: Gulfstream G4, Honolulu, HI, June 24, 2022

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: June 24, 2022, 21:03 local time
- Place: Honolulu, HI
- Airport: Daniel K Inouye International
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Operator: SAOA
- Location: 21.3178° N, 157.9203° W: Placed by OpenAirDocs at DANIEL K INOUYE INTL (HNL), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=21.3178&lon=-157.9203&mi=10
- Aircraft: N307EW, registered now (https://openairdocs.org/aircraft/N307EW) (OpenAirDocs)
- Registry model: Gulfstream Aerospace G-IV (registry code 3980115, https://openairdocs.org/model/gulfstream-aerospace-g-iv) (OpenAirDocs)
- Registry engine: Rolls-Royce TAY MK 610-8 (registry code 54556, https://openairdocs.org/engine/rolls-royce-tay-mk-610-8) (OpenAirDocs)
- Reported make and model: GULFSTREAM G4
- People aboard: 7
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 11,939 total
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20220624008069I

## Narrative

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

FRIDAY, JUNE 24, 2022, AT APPROXIMATELY 2103 HRS. HAWAII STANDARD TIME (HST), A 1988 GULFSTREAM AEROSPACE MODEL G-IV, REGISTRATION NUMBER N307EW (S/N 1051), REPORTED AND DECLARED AN IN-FLIGHT EMERGENCY AND LANDED ON THE ISLAND OF OAHU AT THE HONOLULU INTERNATIONAL AIRPORT (HNL), HONOLULU, HAWAII.

FAA FORM 8020-9, INDICATED AIRCRAFT N307EW WAS OPERATING 100 MILES WEST OF OAHU AT FLIGHT LEVEL 410 WHEN THE FLIGHT CREW REPORTED SMOKE IN THE COCKPIT DUE TO A BATTERY PACK OVERHEATING. AIRCRAFT PILOT IN COMMAND, PIC, REPORTED AN IN-FLIGHT EMERGENCY WITH SMOKE IN THE COCKPIT.  THE AIRCRAFT AND CREW WERE CONTRACTED BY THE DEPARTMENT OF DEFENSE, DOD, TO CALIBRATE A HALAS SENSOR SYSTEM WITH A LASER. THE HALAS SENSOR SYSTEM IS POWERED BY 3 LARGE LITHIUM ION BATTERIES. THE HALAS EQUIPMENT IS LOCATED IN THE AFT SECTION OF THE AIRCRAFT CARGO AREA WHERE THE SMOKE ORIGINATED. NO INJURIES REPORTED.

SATURDAY, 06/25/2022 AT APPROXIMATELY 1030HRS:

FAA ON SCENE AND CONDUCTED ROUTINE INVESTIGATIVE INTERVIEWS AND VERIFIED INFORMATION. REVIEWED, PHOTOGRAPHED AND INSPECTED AIRCRAFT DOCUMENTS, CABIN CARGO AREA, BATTERIES, STRUCTURAL INTEGRITY OF AIRCRAFT OF AFFECTED AREA.

SUNDAY, 6/26/2022: MAINTENANCE TECHNICIANS REMOVED ALL FIRE EXTINGUISHING AGENT FROM CABIN / CARGO AREA. SUBSEQUENTLY, MAINTENANCE TECHNICIANS PREPARE TO REMOVE CABIN CARGO FLOORBOARDS TO PREPARE FOR NEXT DAY INSPECTION OF AIRCRAFT STRUCTURAL MEMBERS.

MONDAY, 6/27/2022 AT APPROXIMATELY 1030 HRS MET WITH ^PRIVACY DATA OMITTED^ ENGINEER, FLIGHT CREW MEMBERS AND MAINTENANCE TECHNICIANS TO DISCUSS ROOT CAUSE OF BATTERY OVERHEAT. PER NTSB REQUEST, PHOTOGRAPHED AND INSPECTED AIRCRAFT STRUCTURAL MEMBERS BENEATH FLOORBOARDS OF BATTERY AREA. NO COMPROMISE OF STRUCTURAL MEMBERS OR ANY CHEMICAL LEAKAGE NOTED.

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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