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NTSB Report
July 25, 1984 · Boeing 727-2M7 · N721RW
Minneapolis, MN
Overview
Report Status
Preliminary report
Event Type
Incident
Date
July 25, 1984
Injury Outcomes
No injuries (127 uninjured)
Location
Minneapolis, MN
Aircraft
Boeing 727-2M7
Tail Number
N721RW
Injuries
None
NTSB Number
CHI84IA314
THE CREW REPORTED THAT THEY NOTICED A DECREASE IN CLIMB RATE WHILE OVER RAPID CITY, SD, EN ROUTE FROM MSP TO SFO AT FLT LEVEL 310. THE PLT NOTED FUEL BURN WAS APRX 1400 LBS AHEAD OF SCHEDULE. IN-FLT INSPECTION REVEALED THAT THE INBOARD TRAILING EDGE FLAPS HAD FAILED TO RETRACT PROPERLY AFTER TAKEOFF AND REMAINED IN A 7 DEG DOWN POSITION. THE FLT RETURNEDTO MINNEAPOLIS AND LANDED AT 1540 CDT (APRX 50 MINS AFTER THE INCIDENT). A POST FLT INSPECTION DISCLOSED THAT THE INBOARD FLAP CONTROL VALVE HAD FAILED. THE FLT CREW SAID THAT THIS MALFUNCTION HAD OCCURRED ON A PREVIOUS FLT AND HAD BEEN REPORTED. THE FLAPS HAD GROUND CHECKED OK BOTH ON THIS & THE PREVIOUS OCCASION. THIS REPORTED FAILURE WAS CORRECTEDBY REPUBLIC AIRLINES MAINTENANCE BY REPLACEMENT OF A FLAP CONTROL VALVE AND INSPECTION OF THE RIGGING IN ACCORDANCE WITHBOEING MAINTENANCE MANUAL 27-51-51, AFTER THIS INCIDENT.
Full Narrative
THE CREW REPORTED THAT THEY NOTICED A DECREASE IN CLIMB RATE WHILE OVER RAPID CITY, SD, EN ROUTE FROM MSP TO SFO AT FLT LEVEL 310. THE PLT NOTED FUEL BURN WAS APRX 1400 LBS AHEAD OF SCHEDULE. IN-FLT INSPECTION REVEALED THAT THE INBOARD TRAILING EDGE FLAPS HAD FAILED TO RETRACT PROPERLY AFTER TAKEOFF AND REMAINED IN A 7 DEG DOWN POSITION. THE FLT RETURNEDTO MINNEAPOLIS AND LANDED AT 1540 CDT (APRX 50 MINS AFTER THE INCIDENT). A POST FLT INSPECTION DISCLOSED THAT THE INBOARD FLAP CONTROL VALVE HAD FAILED. THE FLT CREW SAID THAT THIS MALFUNCTION HAD OCCURRED ON A PREVIOUS FLT AND HAD BEEN REPORTED. THE FLAPS HAD GROUND CHECKED OK BOTH ON THIS & THE PREVIOUS OCCASION. THIS REPORTED FAILURE WAS CORRECTEDBY REPUBLIC AIRLINES MAINTENANCE BY REPLACEMENT OF A FLAP CONTROL VALVE AND INSPECTION OF THE RIGGING IN ACCORDANCE WITHBOEING MAINTENANCE MANUAL 27-51-51, AFTER THIS INCIDENT.
Flight
Event TypeIncident
Event Time14:50 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing 727-2M7
Tail NumberN721RW
Aircraft CategoryAir
Operating RulePart 121
Engines3
Engine TypeTurbofan
Engine DetailsP&W · JT8D · Turbofan · 15000
Seats131
People & Injuries
Injury SummaryNo injuries (127 uninjured)
Fatal0
Serious0
Minor0
Uninjured127
Total127
Crew 1First Class
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 7 kt
Visibility20 sm
CeilingBroken clouds 10000 ft
Temperature / Dew Point57
Altimeter30.00 inHg
Observation Time19:53
Weather SourceWFAC