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ZOB controller chronicles altitude separation loss as C560 experiencing pitch trim problems caused MD80 to climb above assigned altitude because of TCASII RA.
| Attributes | |
| ACN | 658558 |
| Time | |
| Date | 200505 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : mgw.vortac |
| State Reference | WV |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc tower : eggw.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-82 |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | general aviation : personal |
| Make Model Name | Citation Excel |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller time certified in position1 : 17 |
| ASRS Report | 658558 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert flight crew : took evasive action |
| Miss Distance | horizontal : 6000 vertical : 600 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Air carrier X at FL290. Aircraft Y crossing below at FL280. Air carrier X advised he was climbing because traffic below was climbing (TCASII RA). Aircraft Y advised trim tabs (pitch trim) caused him to climb and was having trouble getting it to go back down; and may have to return. After traffic diverged; air carrier X advised he was descending back to FL290 from FL300. Aircraft Y thought he had the problem under control; but would keep an eye on it.
Original NASA ASRS Text
Title: ZOB CTLR CHRONICLES ALT SEPARATION LOSS AS C560 EXPERIENCING PITCH TRIM PROBS CAUSED MD80 TO CLB ABOVE ASSIGNED ALT BECAUSE OF TCASII RA.
Narrative: ACR X AT FL290. ACFT Y XING BELOW AT FL280. ACR X ADVISED HE WAS CLBING BECAUSE TFC BELOW WAS CLBING (TCASII RA). ACFT Y ADVISED TRIM TABS (PITCH TRIM) CAUSED HIM TO CLB AND WAS HAVING TROUBLE GETTING IT TO GO BACK DOWN; AND MAY HAVE TO RETURN. AFTER TFC DIVERGED; ACR X ADVISED HE WAS DSNDING BACK TO FL290 FROM FL300. ACFT Y THOUGHT HE HAD THE PROB UNDER CTL; BUT WOULD KEEP AN EYE ON IT.
Data retrieved from NASA's ASRS site as of January 2009 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.