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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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First officer of air carrier widebody transport aircraft inadvertently over-boosted the engines exceeding design limitations.
| Attributes | |
| ACN | 231227 |
| Time | |
| Date | 199301 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : chs |
| State Reference | SC |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 9000 flight time type : 190 |
| ASRS Report | 231227 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 175 flight time total : 14000 flight time type : 360 |
| ASRS Report | 231403 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence other other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On 1/fri/93 flight X atl to sju ship XXX. After reaching cruise altitude I set power to EPR on flight plan. A few mins later we were given a route change and told to contact en route radio (commercial radio). The captain was having difficulty making contact on HF. I was changing the route and the flight engineer was making a company position report. I looked up and noticed the airspeed stable at 208 KTS. I immediately increased power to return to required cruise mach. During initial power application #2 engine had an N1 overspd (this was not noticed till later in the flight). All engines ran smoothly and power was reset at a number higher than that called for on the flight plan. When we noticed that #2 N1 had experienced an overspd we were more than half way to sju. Since all other engine instruments were normal and the engine was running smoothly we left the engine continue to operate and landed in sju. Contributing factors were the confign of ship XXX. It has no FMS like our other widebody transport aircraft, so it has no cruise autothrottle capability. This was the first time that I flew this ship and the first in a triple INS confign. All past experience has been INS/FMS confign. I let myself become distracted and upon seeing low airspeed advanced throttles rapidly.
Original NASA ASRS Text
Title: FO OF ACR WDB ACFT INADVERTENTLY OVER-BOOSTED THE ENGS EXCEEDING DESIGN LIMITATIONS.
Narrative: ON 1/FRI/93 FLT X ATL TO SJU SHIP XXX. AFTER REACHING CRUISE ALT I SET PWR TO EPR ON FLT PLAN. A FEW MINS LATER WE WERE GIVEN A RTE CHANGE AND TOLD TO CONTACT ENRTE RADIO (COMMERCIAL RADIO). THE CAPT WAS HAVING DIFFICULTY MAKING CONTACT ON HF. I WAS CHANGING THE RTE AND THE FE WAS MAKING A COMPANY POS RPT. I LOOKED UP AND NOTICED THE AIRSPD STABLE AT 208 KTS. I IMMEDIATELY INCREASED PWR TO RETURN TO REQUIRED CRUISE MACH. DURING INITIAL PWR APPLICATION #2 ENG HAD AN N1 OVERSPD (THIS WAS NOT NOTICED TILL LATER IN THE FLT). ALL ENGS RAN SMOOTHLY AND PWR WAS RESET AT A NUMBER HIGHER THAN THAT CALLED FOR ON THE FLT PLAN. WHEN WE NOTICED THAT #2 N1 HAD EXPERIENCED AN OVERSPD WE WERE MORE THAN HALF WAY TO SJU. SINCE ALL OTHER ENG INSTRUMENTS WERE NORMAL AND THE ENG WAS RUNNING SMOOTHLY WE LEFT THE ENG CONTINUE TO OPERATE AND LANDED IN SJU. CONTRIBUTING FACTORS WERE THE CONFIGN OF SHIP XXX. IT HAS NO FMS LIKE OUR OTHER WDB ACFT, SO IT HAS NO CRUISE AUTOTHROTTLE CAPABILITY. THIS WAS THE FIRST TIME THAT I FLEW THIS SHIP AND THE FIRST IN A TRIPLE INS CONFIGN. ALL PAST EXPERIENCE HAS BEEN INS/FMS CONFIGN. I LET MYSELF BECOME DISTRACTED AND UPON SEEING LOW AIRSPD ADVANCED THROTTLES RAPIDLY.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.