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Air carrier flight crew allows airspeed to decay while executing hold, stickshaker activates upon recovery from 800 ft altitude loss.
| Attributes | |
| ACN | 264213 |
| Time | |
| Date | 199402 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 22200 msl bound upper : 23000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 264213 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 9000 |
| ASRS Report | 264132 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Altitude deviation (lost approximately 800 ft in holding) while descending in holding to FL230, PF clicked off autothrottles. Then both PF and PNF went 'heads down' to find approach plates and prepared for autoland approach to runway 35R den. PNF was first 'heads up' and noticed airspeed decaying through 180 KTS and pushed up throttles and alerted PF. PF started hand- flying aircraft to recover airspeed and altitude. During recovery, as engines spooled up, aircraft pitched up, which triggered the stickshaker. Aircraft descent was stopped approximately 800 ft low and PF then regained airspeed and altitude. Remainder of flight and landing at den was uneventful.
Original NASA ASRS Text
Title: ACR FLC ALLOWS AIRSPD TO DECAY WHILE EXECUTING HOLD, STICKSHAKER ACTIVATES UPON RECOVERY FROM 800 FT ALT LOSS.
Narrative: ALTDEV (LOST APPROX 800 FT IN HOLDING) WHILE DSNDING IN HOLDING TO FL230, PF CLICKED OFF AUTOTHROTTLES. THEN BOTH PF AND PNF WENT 'HEADS DOWN' TO FIND APCH PLATES AND PREPARED FOR AUTOLAND APCH TO RWY 35R DEN. PNF WAS FIRST 'HEADS UP' AND NOTICED AIRSPD DECAYING THROUGH 180 KTS AND PUSHED UP THROTTLES AND ALERTED PF. PF STARTED HAND- FLYING ACFT TO RECOVER AIRSPD AND ALT. DURING RECOVERY, AS ENGS SPOOLED UP, ACFT PITCHED UP, WHICH TRIGGERED THE STICKSHAKER. ACFT DSCNT WAS STOPPED APPROX 800 FT LOW AND PF THEN REGAINED AIRSPD AND ALT. REMAINDER OF FLT AND LNDG AT DEN WAS UNEVENTFUL.
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.