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A B767 entered holding at FL300. With autothrottles on; the aircraft slowed to stall warning speed. Crew climbed 300 ft while recovering.
| Attributes | |
| ACN | 778090 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl single value : 30000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : holding |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 11000 flight time type : 5000 |
| ASRS Report | 778090 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 80 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 777430 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : company policies non adherence : far other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overrode automation flight crew : overcame equipment problem flight crew : regained aircraft control flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Entering holding at abc; FL300; heading 260 degrees; direct entry; right turn. Pattern: hold at abc southeast on 150 degree radial; right turns; 20 mi legs; efc XA00. Autoplt and autothrottles engaged in LNAV; VNAV; speed intervene at 230 KIAS. Calculated minimum clean speed 210 KIAS. During entry turn; pilots were distraction momentarily by communications (changes to holding); WX; and planning for possible diversion. Autothrottles failed to maintain airspeed and pilots were not aware of rapid airspeed decay to 200 KIAS until stick shaker activated. PF disconnected autoplt and autothrottles; rolled wings level; and added power. During recovery; aircraft climbed 300 ft for approximately 10 seconds before returning to FL300. Holding airspace limits may have been momentarily exceeded during entry. Deteriorating WX in the holding area required modification of holding pattern and finally moving to another holding pattern further east.
Original NASA ASRS Text
Title: A B767 ENTERED HOLDING AT FL300. WITH AUTOTHROTTLES ON; THE ACFT SLOWED TO STALL WARNING SPD. CREW CLBED 300 FT WHILE RECOVERING.
Narrative: ENTERING HOLDING AT ABC; FL300; HDG 260 DEGS; DIRECT ENTRY; R TURN. PATTERN: HOLD AT ABC SE ON 150 DEG RADIAL; R TURNS; 20 MI LEGS; EFC XA00. AUTOPLT AND AUTOTHROTTLES ENGAGED IN LNAV; VNAV; SPD INTERVENE AT 230 KIAS. CALCULATED MINIMUM CLEAN SPD 210 KIAS. DURING ENTRY TURN; PLTS WERE DISTR MOMENTARILY BY COMS (CHANGES TO HOLDING); WX; AND PLANNING FOR POSSIBLE DIVERSION. AUTOTHROTTLES FAILED TO MAINTAIN AIRSPD AND PLTS WERE NOT AWARE OF RAPID AIRSPD DECAY TO 200 KIAS UNTIL STICK SHAKER ACTIVATED. PF DISCONNECTED AUTOPLT AND AUTOTHROTTLES; ROLLED WINGS LEVEL; AND ADDED PWR. DURING RECOVERY; ACFT CLBED 300 FT FOR APPROX 10 SECONDS BEFORE RETURNING TO FL300. HOLDING AIRSPACE LIMITS MAY HAVE BEEN MOMENTARILY EXCEEDED DURING ENTRY. DETERIORATING WX IN THE HOLDING AREA REQUIRED MODIFICATION OF HOLDING PATTERN AND FINALLY MOVING TO ANOTHER HOLDING PATTERN FURTHER E.
Data retrieved from NASA's ASRS site as of May 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.