# NTSB MIA92IA081: Boeing 727-214A, N752US, San Juan, PR, February 9, 1992

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: February 9, 1992, 17:10 local (21:10 UTC)
- Place: San Juan, PR
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 157 uninjured
- Status: Completed, report June 30, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 33007
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA92IA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33007/pdf
- Page: https://openairdocs.org/ntsb/MIA92IA081

## Probable cause

THE FLIGHT ENGINEER'S LACK OF TRAINING IN EMERGENCY PROCEDURES AND HIS FAILURE TO FOLLOW PUBLISHED EMERGENCY PROCEDURES, RESULTING IN HIS NOT BEING ABLE TO MANUALLY EXTEND THE RIGHT MAIN LANDING GEAR, FOLLOWING THE LOSS OF THE 'A' HYDRAULIC SYSTEM. CONTRIBUTING TO THE INCIDENT WAS THE CAPTAINS FAILURE TO EXHAUST ALL AVAILABLE RESOURCES AND TIME IN ATTEMPTS TO EXTEND THE RIGHT MAIN LANDING GEAR PRIOR TO LANDING WITH THE GEAR RETRACTED.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - hydraulic system,line - chafed
  - maintenance,inspection - improper, company maintenance personnel
  - hydraulic system,line - ruptured
  - hydraulic system - loss,total
- Gear not extended, landing - flare/touchdown
  - emergency procedure - not followed, flight engineer (cause)
  - improper training(emergency procedure(s)), flight engineer (cause)
  - insufficient standards/requirements,airman, company/operator mgmt (cause)
  - in-flight planning/decision - poor, pilot in command (cause)
  - proper assistance - not used, pilot in command (cause)

## Analysis

FLT LOST 'A' HYDRAULIC SYSTEM WHEN LEFT MAIN GEAR DOOR UP LINE RUPTURED DURING GEAR RETRACTION AT POINT IT HAD CHAFFED ON APU. CAPT CALLED FOR 30,000 POUNDS OF FUEL TO BE DUMPED FOLLOWED BY MANUAL EXTENSION OF THE LANDING GEAR. FLT ENG COULD NOT GET RT MAIN GEAR TO EXTEND MANUALLY. CAPT TOLD FLT ENG TO VIEW POSITION OF MAIN LANDING GEAR THROUGH VIEW PORTS IN CABIN. FLT ENG COULD NOT LOCATE THE VIEW PORTS AND RETURNED TO COCKPIT. CAPT THEN ORDERED FUEL DUMPED TO MINIMUM LEVEL AFTER WHICH A LANDING WITH RT MAIN GEAR RETRACTED WAS MADE. AFTER LANDING WHEN AIRCRAFT WAS RAISED THE RT MAIN LANDING GEAR WAS FOUND TO BE STOWED ON THE UPLOCK NORMALLY. THE GEAR WAS THEN EXTENDED FOLLOWING NORMAL MANUAL EXTENSION PROCEDURES. NO EVIDENCE OF MALFUNCTION OF THE RT MAIN GEAR WAS FOUND. THE RT MAIN GEAR EXTENDS BY CRANKING OPPOSITE DIRECTION FROM THE LEFT AND NOSE GEAR. THE FLT ENG BECAME QUALIFIED AS FLT ENG ON 11/03/91 AND HAD ACCUMULATED 200 HOURS AS FLT ENG.

## Aircraft

- Registration: N752US (not matched to a registry record)
- Reported make and model: BOEING 727-214A
- Category: Airplane
- Serial number: 21691
- Airframe hours: 35403
- Engines: P&W JT8D-15A 15500 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Part 121
- Operator: Usair, Inc.
- Registered owner: Usair
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, October 21, 1991, 764 hours before
- Destination: PHL, PHILADELPHIA, PA
- Flight plan: IFR
- Airport: SJU, Luis Munoz Marin Int'L, runway 8, 10,002 × 200 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 23,154 total, 7,398 in this make and model, 173 in the last 90 days, 51 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 70° at 12 knots
- Visibility: 15 statute miles
- Lowest ceiling: 7,000 ft broken
- Temperature: 81 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: SJU, 1 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).

- [Incident 19920209002279I](https://openairdocs.org/incident/19920209002279I), Feb 9, 1992: Boeing 727214, San Juan, Puerto Rico, Minor damage. A hydraulic system failed on climb. Unable to extend right gear. Landed right gear up. Failed line on gear door.

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.