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ZAB controller reported that a B767 lost rvsm capability and while the equipment suffix was updated; conflict alert activated.
| Attributes | |
| ACN | 1547105 |
| Time | |
| Date | 201806 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZAB.ARTCC |
| State Reference | NM |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Altimeter |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (mon) 6 Air Traffic Control Time Certified In Pos 1 (yrs) 24 |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft X checked on my frequency at FL380 and requested descent to FL340. I issued descent to FL370 and was unable lower due to aircraft Y (at FL360) approximately 3.5 nm in trail of aircraft X. After aircraft X leveled off at FL370; the pilot advised that due to an altimeter problem he was unable to maintain rvsm capability and requested lower to leave rvsm airspace. As soon as I updated his equipment suffix to reflect non-rvsm status of the flight; conflict alert was activated and separation was 'lost'. I issued a vector to provide lateral separation and as soon as possible coordinated for lower with the sectors below mine and issued descent clearance to FL280.
Original NASA ASRS Text
Title: ZAB controller reported that a B767 lost RVSM capability and while the equipment suffix was updated; conflict alert activated.
Narrative: Aircraft X checked on my frequency at FL380 and requested descent to FL340. I issued descent to FL370 and was unable lower due to Aircraft Y (at FL360) approximately 3.5 nm in trail of Aircraft X. After Aircraft X leveled off at FL370; the pilot advised that due to an altimeter problem he was unable to maintain RVSM capability and requested lower to leave RVSM airspace. As soon as I updated his equipment suffix to reflect non-RVSM status of the flight; conflict alert was activated and separation was 'lost'. I issued a vector to provide lateral separation and as soon as possible coordinated for lower with the sectors below mine and issued descent clearance to FL280.
Data retrieved from NASA's ASRS site 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.