# NTSB NYC87IA167: Nihon YS-11, N187P, Hyannis, MA, June 6, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 6, 1987, 14:15 local (18:15 UTC)
- Place: Hyannis, MA
- Location: 41.6693° N, 70.2804° W: Placed by OpenAirDocs at CAPE COD GATEWAY (HYA), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.6693&lon=-70.2804&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 23 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 30530
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC87IA167
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30530/pdf
- Page: https://openairdocs.org/ntsb/NYC87IA167

## Sequence of events

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

- Main gear collapsed, landing - flare/touchdown
  - landing gear,main gear - corroded (cause)
  - landing gear,main gear - failure,total (cause)

## Analysis

THE YS-11 WAS LANDING WITH A RIGHT CROSSWIND. THE PILOT SAID HE TOUCHED DOWN ON THE RIGHT MAIN LANDING GEAR FIRST AND UPON TOUCHDOWN, THE RIGHT MAIN LANDING GEAR COLLAPSED. THE AIRCRAFT STAYED ON THE RUNWAY AND RECEIVED MINOR DAMAGE. THE COCKPIT CREW OF 2, 2 FLIGHT ATTENDANTS, 7 REVENUE PASSENGERS AND 12 NON-REVENUE PASSENGERS (A GRADUATING GLASS OF FLIGHT ATTENDANTS) WERE NOT INJURED DURING THE SUBSEQUENT EVACUATION OF THE AIRCRAFT. EXAMINATION OF THE LANDING GEAR TRUNION DISCLOSED A STRESS FRACTURE AND HEAVY CORROSION. THE CORROSION PRODUCED PITTING WHICH CAN BE A SOURCE OF STRESS. THE LANDING GEAR HAD BEEN OVERHAULED IN ACCORDANCE WITH RECOMMENDED PROCEDURES WHICH INCLUDE CORROSION PREVENTATIVE MEASURES. THE CORROSION WAS NOT DETECTED DURING NORMAL INSPECTIONS.

## Aircraft

- Registration: [N187P](https://openairdocs.org/deregistered/N187P-2012-08-14), registration cancelled 2012-08-14, S/N 2061, built 1968 (OpenAirDocs)
- Reported make and model: NIHON YS-11
- Registry model: [Nihon YS-11A-500](https://openairdocs.org/model/nihon-ys-11a-500) (registry code 6310416) (OpenAirDocs)
- Registry engine: [Rolls-Royce DART-542 series](https://openairdocs.org/engine/rolls-royce-dart-542-series) (registry code 54522, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 2061
- Airframe hours: 31292
- Engines: Rolls-Royce MK-532-7 2050 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 121
- Registered owner: Provincetown-Boston Airlines
- Airworthiness certificate: Standard, Normal
- Departed: MVY, MARTHA'S VINYRD, MA
- Flight plan: IFR
- Airport: HYA, Hyannis, runway 33, 3,999 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 13,700 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 350° at 10 knots, gusting 15
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Altimeter: 30.00 inHg

## 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 19870606035669I](https://openairdocs.org/incident/19870606035669I), Jun 6, 1987: Nihon YS11A500, Hyannis, MA, Minor damage. Right main gear collapsed on rollout. Fatigue crack found in upper outboard section of the strut.

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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