# NTSB Accident ANC90FA020
> **BOEING 747-400** · 1989-12-15 · ANCHORAGE, AK, USA · NONE
## Event
- **NTSB number:** ANC90FA020
- **Event ID:** 20001213X29893
- **Type:** Accident
- **Date:** 1989-12-15
- **Location:** ANCHORAGE, AK, USA
- **Coordinates:** 61.160522, -149.989074
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 245
- **Total aboard:** 245
## Aircraft
- **Make:** BOEING
- **Model:** 747-400
- **Registration:** PHBFC
- **FAR Part:** 129
- **Engines:** 4
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** IMC
## Probable cause

INADVERTENT ENCOUNTER WITH VOLCANIC ASH CLOUD, WHICH RESULTED IN DAMAGE FROM FOREIGN MATERIAL (FOREIGN OBJECT) AND SUBSEQUENT COMPRESSOR STALLING OF ALL ENGINES.  A FACTOR RELATED TO THE ACCIDENT WAS:  THE LACK OF AVAILABLE INFORMATION ABOUT THE ASH CLOUD TO ALL PERSONNEL INVOLVED.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC90FA020) · AI Analytics · CC0 1.0*