# Incident 19980226014109I: Doug DC1010, Honolulu, HI, February 26, 1998

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: February 26, 1998, 10:00 local time
- Place: Honolulu, HI
- Airport: Honolulu International Airport
- Phase of flight: Climb
- Operating rules: Air carrier (Part 121)
- Operator: UALA
- Location: 21.3069° N, 157.8583° W: Placed by OpenAirDocs: center of Honolulu, HI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=21.3069&lon=-157.8583&mi=10
- Aircraft: N1845U (not matched to a registry record)
- Reported make and model: DOUG DC1010
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 11,482 total, 1,142 in this make and model, 152 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980226014109I

## Narrative

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

NARRATIVE: AFTER TAKEOFF, PRESSURIZATION DID NOT WORK IN AUTO MODE. THE FLIGHT ENGINEER SELECTED SEMI-AUTO MODE ON CLIMB OUT OF FL340. THEN SEMI-AUTO MODE FAILED, AND STANDBY MODE WAS SELECTED AND PRESSURIZATION WORKED NORMALLY UNTIL LEVEL OFF AT FL340; AND FOR ONE HOUR AT THAT FLIGHT LEVEL. THE AIRCRAFT BEGAN A STEP CLIMB TO FL360, AND THE CABIN BEGAN TO DEPRESSURIZE. THE FLIGHT ENGINEER SELECTED MANUAL MODE, BUT COULD NOT REGAIN CONTROL OF THE CABIN PRESSURE. THE CAPTAIN INITIATED AN EMERGENCY DESCENT AND THEY WERE ABLE TO REGAIN CABIN PRESSURE AT 15,000 FT. MSL, HOWEVER, THE OXYGEN MASKS HAD ALREADY DEPLOYED IN THE CABIN. THE CAPTAIN ELECTED TO RETURN TO PHNL. ^PRIVACY DATA OMITTED^ THE CAPTAIN AND FLIGHT ENGINEER HAVE BEEN RETRAINED ON THE PRESSURIZATION SYSTEM. THE CMO PLANS NO FURTHER ACTION AGAINST THE CREW OR COMPANY. THE ARINC OPERATOR INSTRUCTED THE CREW TO SET THE TRANSPONDER TO 7500. APPROPRIATE RESPONSE WAS INITIATED BY ATC, AIRPORTS DIVISION, HONOLULU POLICE DEPT., FBI, AND HNL-FSDO. THE REASON THE ARINC OPERATOR ISSUED THE 7500 CODE IS UNKNOWN.

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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