# NTSB SEA87IA004: Cessna 402C, N2651Y, Everett, WA, October 4, 1986

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 4, 1986, 06:53 local (13:53 UTC)
- Place: Everett, WA
- Coordinates: 47.889057, -122.249183 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.8891&lon=-122.2492&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40541
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA87IA004
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40541/pdf
- Page: https://openairdocs.org/ntsb/SEA87IA004

## Analysis

WHILE ENROUTE FROM SEATTLE TO BELLINGHAM ON A REGULARLY SCHEDULED PASSENGER COMMUTER FLIGHT THE LEFT ENGINE NUMBER 3 EXHAUST RISER BURNED THROUGH. THE PILOT VISUALLY DETECTED A DISCOLORATION ON THE LEFT ENGINE NACELLE INFLIGHT BUT WAS UNABLE TO EXECUTE A PRECAUTIONARY LANDING BEFORE A BURN THROUGH OF THE ENGINE COWL OCCURRED. AN UNEVENTFUL LANDING AT EVERETT, WASHINGTON, WAS ACCOMPLISHED. THE COMPONENT HAD APPROXIMATELY 4000 HOURS SINCE ITS LAST OVERHAUL AND 70 HOURS SINCE ITS LAST 100 HOUR INSPECTION.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, cruise - normal
  - exhaust system,manifold/pipe - burned (cause)
  - cooling system,cowling - burned

## Aircraft

- Registration: [N2651Y](https://openairdocs.org/deregistered/N2651Y-2006-10-26), registration cancelled 2006-10-26, S/N 402C0343, built 1980 (OpenAirDocs)
- Reported make and model: CESSNA 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (registry code 207590R) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402C0343
- Airframe hours: 8252
- Engines: CONTINENTAL TSIO-520-VB 325 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Registered owner: San Juan Air Service, Inc.
- Airworthiness certificate: Standard, Normal
- Departed: SEA, SEATTLE, WA
- Destination: BLI, BELLINGHAM, WA
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; airline transport, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 6,055 total, 2,700 in this make and model, 5 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Visibility: 15 statute miles

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19861004087539I](https://openairdocs.org/incident/19861004087539I), Oct 4, 1986: Cessna 402C, Everett, WA, Minor damage. Small dark hole in cowling appeared. Precautionary landing. Found hole burned through NR3 engine exhaust riser.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.