# NTSB WPR12CA003: Cessna 172P, N9853L, Agana, October 6, 2011

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: October 6, 2011, 01:30 UTC
- Place: Agana
- Coordinates: 13.483611, 144.791381 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=13.4836&lon=144.7914&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Defining event: [Taxi-from runway: Prop/jet/rotor blast/suction](https://openairdocs.org/ntsb-events/082)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 27, 2011
- Report: Approved by Office Director
- NTSB office: Western Pacific Region
- NTSB case key (mKey): 81997
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12CA003
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81997/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81997
- Page: https://openairdocs.org/ntsb/WPR12CA003

## Probable cause

The pilot's failure to avoid the jet blast while taxiing and the ground air traffic controller's failure to advise the pilot of the hazard.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Attain/maintain not possible (probable cause); cases with it: [Cessna 172P, 9 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=2072436), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md)
- [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna 172P, 20 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2072436), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md)
- [Info processing/decision: identification/recognition](https://openairdocs.org/ntsb-findings/02041510): Personnel issues › Action/decision · ATC personnel (probable cause); cases with it: [Cessna 172P, 3 cases](https://openairdocs.org/ntsb-findings/02041510/cases.md?model=2072436), [All aircraft, 559 cases](https://openairdocs.org/ntsb-findings/02041510/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Taxi-from runway: Prop/jet/rotor blast/suction](https://openairdocs.org/ntsb-events/082) (defining event); cases with it: [Cessna 172P, 1 case](https://openairdocs.org/ntsb-events/082/sequence.md?model=2072436), [All aircraft, 44 cases](https://openairdocs.org/ntsb-events/082/sequence.md)

## Analysis

The pilot said that he returned to the airport and, after landing, was cleared by an air traffic controller to exit the runway and to proceed to parking, which would require his airplane to cross behind a heavy jet airplane. The pilot reported that he was aware that the heavy jet airplane had been on the taxiway all morning doing periodic engine run-ups. The pilot said that he thought about refusing the clearance but did not. While taxiing across the taxiway behind the jet, a jet blast struck the airplane. The airplane initially slid sideways, then the jet blast picked up the left wing and the right wing struck the ground, which caused substantial damage to the right wing.

## Factual narrative

The pilot reported that he was aware that a heavy jet aircraft had been on taxiway G all morning doing periodic engine runups. He departed on his flight and returned to the airport. After landing, the single-engine airplane was cleared by air traffic controllers to exit the runway on taxiway E and proceed to parking, which would put the aircraft crossing taxiway G behind the heavy jet. The pilot said he thought about refusing the clearance but followed it anyway. While taxiing across taxiway G, the jet blast from the heavy jet struck the airplane. The airplane initially slid sideways, then the jet blast picked up the left wing and the right wing struck the ground, which caused substantial damage to the right wing.

## Aircraft

- Registration: [N9853L](https://openairdocs.org/aircraft/N9853L), registered now, S/N 17276639, built 1986 (OpenAirDocs)
- Reported make and model: CESSNA 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17276639
- Airframe hours: 16250
- Engines: LYCOMING O-320 SERIES 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Trend Vector Aviation Int
- Registered owner: Trend Vector Aviation Int
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 22, 2011, 37 hours before
- Departed: PGUM, Agana
- Destination: PGUM, Agana
- Airport: PGUM, Guam International Airport

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; injuries: none; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review August 7, 2010; seat: left; flight hours: 487 total, 234 in this make and model, 438 as pilot in command, 117 in the last 90 days, 59 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 88 °F, dew point 75 °F
- Altimeter: 29.89 inHg
- Observed at: PGUM

## 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 20111006025289A](https://openairdocs.org/incident/20111006025289A), Oct 6, 2011: Cessna 172P, Tamuning, GU, Substantial damage. Pilot was conducting a discovery flight (flying orientation) to a japanese national for this flight. Flight was normal until clearing runway 6R on e taxiway -…

## Other investigations on N9853L (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 GAA15CA058](https://openairdocs.org/ntsb/GAA15CA058), Apr 17, 2015: Cessna 172P (N9853L), Tamuning, substantial damage. Probable cause: The student pilot's failure to maintain pitch control, resulting in a hard landing.

## Docket (1 files)

The files NTSB released with the investigation on November 21, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81997. 635 KB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 635 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40357218&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF

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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