# NTSB ANC88FA019: Cessna 402B, N969JW, Anchorage, AK, December 9, 1987

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: December 9, 1987, 15:58 local (19:58 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159141, -149.990615 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1591&lon=-149.9906&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor, 3 uninjured
- Status: Completed, report August 8, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4942
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88FA019
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4942/pdf
- Page: https://openairdocs.org/ntsb/ANC88FA019

## Sequence of events

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

- Vortex turbulence encountered, approach - vfr pattern - final approach
  - light condition - dusk (contributing factor)
  - atc clearance - improper, atc personnel(dep/apch) (contributing factor)
  - unsafe/hazardous condition warning - not issued, atc personnel(lcl/gnd/clnc) (contributing factor)
  - condition(s)/step(s) insufficiently defined, faa(other/organization)
  - in-flight planning/decision - improper, pilot in command (cause)
- In flight collision with terrain/water, approach - vfr pattern - final approach

## Analysis

DRG ARR IN HVY TRAFFIC, REEVE FLT 726 (BOEING 727) & WILBURS FLT 304 (CESSNA 402B, N969JW) RECD RADAR ADZYS FOR VISUAL APCHS TO RWYS 6L & 6R, RESPECTIVELY. SUBSEQUENTLY, BOTH FLTS WERE CLRD TO LND. AT 1555:04, THE LCL TWR CTLR TRANSMITTED THAT THE WND AT THE APCH END OF RWY 6R WAS FM 340 DEG AT 9 KTS & THE MIDFLD WND WAS 330 DEG AT 7. AT APRX 1557, FLT 726 LNDD ON RWY 6L. APRX 69 SEC LATER, AS FLT 304 WAS X-ING THE THRESHOLD (THR) OF RWY 6R AT ABOUT 100' AGL, THE ACFT ENCTRDWAKE TURBC (W/T) & ROLLED SHARPLY TO THE RGT, BYD 90 DEG. THE PLT CORRECTED WITH AILERON & PWR, BUT THE ACFT LOST ALT & HIT THE GND BFR RCVRY. THE WND DRG THE 1601 WX OBS WAS 020 DEG AT 5 KTS. RWY CTRLNS WERE 700' APART, THRESHOLD OF RWY 6LWAS 4600' BYD THE THRESHOLD OF RWY 6R. THE APCH CTLR DID NOT ADZ EITHER FLT OF THE OTHER'S PSN, NOR DID THE TWR CTLR GIVE A W/T ADZRY TO FLT 304. CALCULATIONS SHOWED VORTICES COULD HAVE DRIFTED FM RWY 6L TO RWY 6R IN AS LITTLE AS 28 SEC.FAA HNDBK ADDRESSED W/T ADZY FOR PARALLEL RWY OPNS WITH LESS THAN 2500' SEPN, BUT DID NOT ADDRESS OFFSET THRESHOLDS.

## Aircraft

- Registration: [N969JW](https://openairdocs.org/deregistered/N969JW-2013-09-17), registration cancelled 2013-09-17, S/N 402B0328, built 1972 (OpenAirDocs)
- Reported make and model: CESSNA 402B
- Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (registry code 207590P) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402B0328
- Airframe hours: 5301
- Engines: CONTINENTAL TSIO-520-E 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Wilbur'S Inc., doing business as Wilburs Flight Operations
- Registered owner: Wilburs Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 23, 1987, 71 hours before
- Departed: VDZ, VALDEZ, AK
- Destination: ANC
- Flight plan: IFR
- Airport: ANC, Anchorage, runway 6R, 10,897 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; airline transport, flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 11,495 total, 1,225 in this make and model, 11,470 as pilot in command, 265 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 340° at 9 knots
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 18 °F, dew point 10 °F
- Altimeter: 28.00 inHg
- Observed at: ANC, 25 nm away

## FAA reports on this event (1)

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

- [Accident 19871209071149A](https://openairdocs.org/incident/19871209071149A), Dec 9, 1987: Cessna 402B, Anchorage, AK, Substantial damage. Encountered wake turbulence from parallel landing 727. Lost control but leveled prior impact. No ATC wake advisory.

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.

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