 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Altitude deviation altitude overshot -- air carrier climbs above its assigned altitude and the crew quickly returns to the proper altitude.
| Attributes | |
| ACN | 307950 |
| Time | |
| Date | 199506 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : air |
| State Reference | OH |
| Altitude | msl bound lower : 33000 msl bound upper : 33600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 170 flight time total : 6500 flight time type : 170 |
| ASRS Report | 307950 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 17000 |
| ASRS Report | 307945 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft climbing from FL310 to FL330. Stopped climb at FL335 and returned to FL330. Upon reaching FL332 ATC then reclred us to FL350. Aircraft autoplt did not feature an altitude hold mode. Our clearance was initially to FL350 and then reclred to FL330. Possible confusion on level cleared. Supplemental information from acn 307958: at the time of the occurrence, I was facing backwards retrieving a manual from my flight kit to check for the company en route SELCAL frequency. This was the 3RD morning of a rotation that has 4 early morning departures. Our wake-up call this morning was XX10 EDT. The angle of the sun was low which caused the altitude warning light's intensity to not be as noticeable as it is in the shade. The altitude in the warning system was set correctly, but the block iv autoplts of our fleet have no altitude capture feature. The PF initially leveled off at FL330, but before he engaged altitude hold, another problem with the omega navigation system tying into the autoplt distracted him.
Original NASA ASRS Text
Title: ALTDEV ALT OVERSHOT -- ACR CLBS ABOVE ITS ASSIGNED ALT AND THE CREW QUICKLY RETURNS TO THE PROPER ALT.
Narrative: ACFT CLBING FROM FL310 TO FL330. STOPPED CLB AT FL335 AND RETURNED TO FL330. UPON REACHING FL332 ATC THEN RECLRED US TO FL350. ACFT AUTOPLT DID NOT FEATURE AN ALT HOLD MODE. OUR CLRNC WAS INITIALLY TO FL350 AND THEN RECLRED TO FL330. POSSIBLE CONFUSION ON LEVEL CLRED. SUPPLEMENTAL INFO FROM ACN 307958: AT THE TIME OF THE OCCURRENCE, I WAS FACING BACKWARDS RETRIEVING A MANUAL FROM MY FLT KIT TO CHK FOR THE COMPANY ENRTE SELCAL FREQ. THIS WAS THE 3RD MORNING OF A ROTATION THAT HAS 4 EARLY MORNING DEPS. OUR WAKE-UP CALL THIS MORNING WAS XX10 EDT. THE ANGLE OF THE SUN WAS LOW WHICH CAUSED THE ALT WARNING LIGHT'S INTENSITY TO NOT BE AS NOTICEABLE AS IT IS IN THE SHADE. THE ALT IN THE WARNING SYS WAS SET CORRECTLY, BUT THE BLOCK IV AUTOPLTS OF OUR FLEET HAVE NO ALT CAPTURE FEATURE. THE PF INITIALLY LEVELED OFF AT FL330, BUT BEFORE HE ENGAGED ALT HOLD, ANOTHER PROB WITH THE OMEGA NAV SYS TYING INTO THE AUTOPLT DISTRACTED HIM.
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.