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ZOB controller expressed concern regarding pilot's en route speed adjustments without ATC notification.
| Attributes | |
| ACN | 583467 |
| Time | |
| Date | 200306 |
| Day | Mon |
| Place | |
| State Reference | ON |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 20 controller radar : 20 controller time certified in position1 : 20 |
| ASRS Report | 583467 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | inflight encounter : turbulence other anomaly |
| Independent Detector | other controllera |
| Resolutory Action | controller : separated traffic controller : issued new clearance |
| Supplementary | |
| Problem Areas | ATC Human Performance Weather Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft #1 was wbound on jet route at FL280, 7 mi in front of aircraft #2, also wbound on jet route at FL280. Aircraft #1 encountered turbulence and slowed approximately 30 KTS. Aircraft #2 now had a 40 KT overtake, and close to 6 mi. Aircraft #2 was turned 50 degree to left to insure separation. According to FARS/ATP 7110.65, do not have to notify when slowing from filed speed.
Original NASA ASRS Text
Title: ZOB CTLR EXPRESSED CONCERN REGARDING PLT'S ENRTE SPD ADJUSTMENTS WITHOUT ATC NOTIFICATION.
Narrative: ACFT #1 WAS WBOUND ON JET RTE AT FL280, 7 MI IN FRONT OF ACFT #2, ALSO WBOUND ON JET RTE AT FL280. ACFT #1 ENCOUNTERED TURB AND SLOWED APPROX 30 KTS. ACFT #2 NOW HAD A 40 KT OVERTAKE, AND CLOSE TO 6 MI. ACFT #2 WAS TURNED 50 DEG TO L TO INSURE SEPARATION. ACCORDING TO FARS/ATP 7110.65, DO NOT HAVE TO NOTIFY WHEN SLOWING FROM FILED SPD.
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.