# Incident 19960331044229I: Dorner DO328100, Eugene, OR, March 31, 1996

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: March 31, 1996, 06:30 local time
- Place: Eugene, OR
- Damage: Minor damage
- Phase of flight: Climb
- Operating rules: Air carrier (Part 121)
- Location: 44.0391° N, 123.2196° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=44.0391&lon=-123.2196&mi=10
- Aircraft: N334PH, a cancelled registration (https://openairdocs.org/deregistered/N334PH-2014-10-06) (OpenAirDocs)
- Registry model: Dornier Luftfahrt DO 328-100 (registry code 2996000, https://openairdocs.org/model/dornier-luftfahrt-do-328-100) (OpenAirDocs)
- Registry engine: Pratt & Whitney Canada PW119C (registry code 52163, https://openairdocs.org/engine/pratt-whitney-canada-pw119c) (OpenAirDocs)
- Reported make and model: DORNER DO328100
- People aboard: 27
- Fatal injuries: 0
- Pilot flight hours: 5,266 total, 178 in the last 90 days
- NTSB investigation: [NTSB SEA96IA074](https://openairdocs.org/ntsb/SEA96IA074) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19960331044229I

## Narrative

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

(-5)THE FLIGHT CREW REPORTED THAT AS THE AIRPLANE WAS CLIMBING BETWEEN 14,000 FEET AND 16,000 FEET IN LIGHT ICING CONDITIONS, THEY FELT A MODERATE SHUDDER. THE AUTOPILOT DISCONNECTED, AND THE AIRPLANE IMMEDIATELY ROLLED 15 DEGREES TO THE LEFT. AN EMERGENCY WAS DECLARED, AND THE FLIGHT WAS DIVERTED WITH NO FURTHER INCIDENT. AFTER LANDING, EXAMINATION REVEALED THAT A SECTION OF THE LEFT WING DE-ICING BOOT HAD DELAMINATED. WHEN PRESSURE WAS APPLIED TO THE SYSTEM, A BUBBLE WAS CREATED. WHEN PRESSURE WAS OFF, THE DELAMINATED PLIES WERE STRETCHED BEYOND THEIR ELASTIC LIMITS AND WOULD NOT RETURN TO THE NORMAL SHAPE, THUS CREATING WRINKLES. EXAMINATION OF THE PLIES REVEALED THAT THERE WAS NO EVIDENCE OF CONTAMINATION. THE SEPARATION OCCURRED BETWEEN THE ADHESION COAT AND THE KNIT FABRIC. THE MANUFACTURER OF THE BOOT REPORTED THAT THIS MODE OF FAILURE WAS CONSISTENT WITH AN ELASTROMERIC CONSTRUCTION THAT HAD REACHED THE END OF ITS USEFUL LIFE. THE OUTER DELAMINATED PLIES WERE FOUND TO BE UNUSUALLY DURABLE, WHICH RESULTED IN A LARGE BUBBLE INSTEAD OF THE NORMALLY EXPECTED 'BURST' OF THE OUTER PLIES.

## 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 SEA96IA074](https://openairdocs.org/ntsb/SEA96IA074), Mar 31, 1996: Dornier DO 328-100 (N334PH), Eugene, OR, incident, minor damage. Probable cause: delamination of the wing de-icing boot, due to the boot reaching its life limit.

## Other reports on N334PH (1)

Matched to the same aircraft by N-number and date.

- [Incident 19951214045299I](https://openairdocs.org/incident/19951214045299I), Dec 14, 1995: Dorner DO328100 (N334PH), Seattle, WA, Minor damage. Lightning strike during approach. Damaged left wing tip. Nav light assembly missing. Burn marks on rivets.

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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