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Air carrier medium large transport altitude deviation overshot during climb causing close proximity with VFR aircraft in cruise opposite direction.
| Attributes | |
| ACN | 89041 |
| Time | |
| Date | 198806 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bwz |
| State Reference | NJ |
| Altitude | msl bound lower : 17000 msl bound upper : 17300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 3000 flight time type : 1300 |
| ASRS Report | 89041 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 17000 flight time type : 500 |
| ASRS Report | 89040 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were climbing to our assigned altitude of 17000' the left air conditioning pack was inoperative in the aircraft, so I was making sure the pressurization was operating properly. As it was a very hot day, we were flying into the sun. With the pack inoperative, it was very hot in the cockpit. We had discussed alternate cabin airflow to try and cool it off. As I was working on this problem, I glanced at the altimeter and noted we were passing 17000'. I checked the altitude assignment of 17000' and was starting to advise the captain when he took corrective action. At the same time, the center called to verify 17000' assigned and then called traffic at 10:30-11 O'clock, 17500', which we saw right away. Center told us his screen showed us at 17500' the highest my altimeter read was 17300'.
Original NASA ASRS Text
Title: ACR MLG ALT DEVIATION OVERSHOT DURING CLIMB CAUSING CLOSE PROX WITH VFR ACFT IN CRUISE OPPOSITE DIRECTION.
Narrative: WE WERE CLBING TO OUR ASSIGNED ALT OF 17000' THE LEFT AIR CONDITIONING PACK WAS INOP IN THE ACFT, SO I WAS MAKING SURE THE PRESSURIZATION WAS OPERATING PROPERLY. AS IT WAS A VERY HOT DAY, WE WERE FLYING INTO THE SUN. WITH THE PACK INOP, IT WAS VERY HOT IN THE COCKPIT. WE HAD DISCUSSED ALTERNATE CABIN AIRFLOW TO TRY AND COOL IT OFF. AS I WAS WORKING ON THIS PROB, I GLANCED AT THE ALTIMETER AND NOTED WE WERE PASSING 17000'. I CHKED THE ALT ASSIGNMENT OF 17000' AND WAS STARTING TO ADVISE THE CAPT WHEN HE TOOK CORRECTIVE ACTION. AT THE SAME TIME, THE CENTER CALLED TO VERIFY 17000' ASSIGNED AND THEN CALLED TFC AT 10:30-11 O'CLOCK, 17500', WHICH WE SAW RIGHT AWAY. CENTER TOLD US HIS SCREEN SHOWED US AT 17500' THE HIGHEST MY ALTIMETER READ WAS 17300'.
Data retrieved from NASA's ASRS site as of August 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.