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DC9-2000 had altimeter set to 29 pt 52 versus 29 pt 92 and climbed past FL280 to FL284. This caused a TCASII RA with an opposite direction traffic air carrier at FL290.
| Attributes | |
| ACN | 354668 |
| Time | |
| Date | 199612 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : crl airport : cle |
| State Reference | MI |
| Altitude | msl bound lower : 28000 msl bound upper : 28400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 20 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 9000 |
| ASRS Report | 354668 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 16500 flight time type : 4500 |
| ASRS Report | 354475 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : clearance non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While climbing out of cle up to FL280, received a yellow TCASII of traffic at 12 O'clock, approximately 1000 ft above us. As we climbed through FL275 we got an RA to 'monitor vertical speed.' first officer and I were at first confused by this, but looked outside and immediately saw oncoming traffic. We were going to clear the traffic below him and looked at altimeters, which both said FL280. Then first officer said check your altimeter at 29.92. It was then that we realized we had them still set at cle airport setting of 29.52. We immediately reset altimeters and descended back to FL280. Center said we had a loss of separation with other aircraft passing within 2 mi and 600 ft. A big contributing factor to this incident was the extreme traffic saturation in the sector. We had our assigned altitude changed at least 2 times (once going through FL180, causing us to miss changing our altimeter settings).
Original NASA ASRS Text
Title: DC9-2000 HAD ALTIMETER SET TO 29 PT 52 VERSUS 29 PT 92 AND CLBED PAST FL280 TO FL284. THIS CAUSED A TCASII RA WITH AN OPPOSITE DIRECTION TFC ACR AT FL290.
Narrative: WHILE CLBING OUT OF CLE UP TO FL280, RECEIVED A YELLOW TCASII OF TFC AT 12 O'CLOCK, APPROX 1000 FT ABOVE US. AS WE CLBED THROUGH FL275 WE GOT AN RA TO 'MONITOR VERT SPD.' FO AND I WERE AT FIRST CONFUSED BY THIS, BUT LOOKED OUTSIDE AND IMMEDIATELY SAW ONCOMING TFC. WE WERE GOING TO CLR THE TFC BELOW HIM AND LOOKED AT ALTIMETERS, WHICH BOTH SAID FL280. THEN FO SAID CHK YOUR ALTIMETER AT 29.92. IT WAS THEN THAT WE REALIZED WE HAD THEM STILL SET AT CLE ARPT SETTING OF 29.52. WE IMMEDIATELY RESET ALTIMETERS AND DSNDED BACK TO FL280. CTR SAID WE HAD A LOSS OF SEPARATION WITH OTHER ACFT PASSING WITHIN 2 MI AND 600 FT. A BIG CONTRIBUTING FACTOR TO THIS INCIDENT WAS THE EXTREME TFC SATURATION IN THE SECTOR. WE HAD OUR ASSIGNED ALT CHANGED AT LEAST 2 TIMES (ONCE GOING THROUGH FL180, CAUSING US TO MISS CHANGING OUR ALTIMETER SETTINGS).
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.