Altitude deviation crossing restr not met, descent during climb clearance.

Attributes
ACN	299438
Time
Date	199503
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : onm
State Reference	NM
Altitude	msl bound lower : 29000 msl bound upper : 33000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : abq
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	299438
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	299612
Events
Anomaly	altitude deviation : undershoot inflight encounter : weather inflight encounter other non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

At XA55Z, 40 NM southwest of onm, ZAB cleared us from FL290 to FL330 with a requirement to be level in 5 mins. We used vertical speed at 1000 FPM to meet the time limit. During the climb, airspeed decreased to 240 KTS. ATC directed a turn. I used 10 degrees of bank. At FL325, with light chop, I [pushed altitude hold to leveloff, but airspeed continued to decrease. At 220 KTS, I disconnected the autoplt and began a descent. The captain informed ATC. It was necessary to descend to FL315 to recover airspeed. Mountain wave turbulence was forecast in this area and later, when level at FL330, our airspeed varied plus or minus 10 KTS. ATC did not indicate that any conflict occurred. Lessons learned: 1) watch tight climb or descent restrs from ATC. 2) vertical speed mode can bite you at high altitude. 3) mountain wave may cause airspeed or pitch changes in the climb. Supplemental information from acn 299612: performance computer indicated further climb to FL330 available and I confirmed gross weights loaded in computer matched aircraft. Dispatch WX indicated area of moderate turbulence and mountain wave.

Original NASA ASRS Text

Title: ALTDEV XING RESTR NOT MET, DSCNT DURING CLB CLRNC.

Narrative: AT XA55Z, 40 NM SW OF ONM, ZAB CLRED US FROM FL290 TO FL330 WITH A REQUIREMENT TO BE LEVEL IN 5 MINS. WE USED VERT SPD AT 1000 FPM TO MEET THE TIME LIMIT. DURING THE CLB, AIRSPD DECREASED TO 240 KTS. ATC DIRECTED A TURN. I USED 10 DEGS OF BANK. AT FL325, WITH LIGHT CHOP, I [PUSHED ALT HOLD TO LEVELOFF, BUT AIRSPD CONTINUED TO DECREASE. AT 220 KTS, I DISCONNECTED THE AUTOPLT AND BEGAN A DSCNT. THE CAPT INFORMED ATC. IT WAS NECESSARY TO DSND TO FL315 TO RECOVER AIRSPD. MOUNTAIN WAVE TURB WAS FORECAST IN THIS AREA AND LATER, WHEN LEVEL AT FL330, OUR AIRSPD VARIED PLUS OR MINUS 10 KTS. ATC DID NOT INDICATE THAT ANY CONFLICT OCCURRED. LESSONS LEARNED: 1) WATCH TIGHT CLB OR DSCNT RESTRS FROM ATC. 2) VERT SPD MODE CAN BITE YOU AT HIGH ALT. 3) MOUNTAIN WAVE MAY CAUSE AIRSPD OR PITCH CHANGES IN THE CLB. SUPPLEMENTAL INFO FROM ACN 299612: PERFORMANCE COMPUTER INDICATED FURTHER CLB TO FL330 AVAILABLE AND I CONFIRMED GROSS WTS LOADED IN COMPUTER MATCHED ACFT. DISPATCH WX INDICATED AREA OF MODERATE TURB AND MOUNTAIN WAVE.

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.