B727 crew had altitude overshoot in ZLA class a.

Attributes
ACN	475385
Time
Date	200006
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : trm.vortac
State Reference	CA
Altitude	msl bound lower : 27000 msl bound upper : 27300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	B727-100
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 170 flight time total : 2100 flight time type : 165
ASRS Report	475385
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment : altitude alert other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During climb to FL270, we accidentally climbed through FL270 to FL273. When the altitude alert went off at FL273 we immediately returned to FL270. Contributing factors are as follows: the captain was distracted by his HSI processing abnormally. I was distracted by changing from lax departure charts to phx arrival charts. The flight engineer was distracted by the flight engineer panel.

Original NASA ASRS Text

Title: B727 CREW HAD ALT OVERSHOOT IN ZLA CLASS A.

Narrative: DURING CLB TO FL270, WE ACCIDENTALLY CLBED THROUGH FL270 TO FL273. WHEN THE ALT ALERT WENT OFF AT FL273 WE IMMEDIATELY RETURNED TO FL270. CONTRIBUTING FACTORS ARE AS FOLLOWS: THE CAPT WAS DISTRACTED BY HIS HSI PROCESSING ABNORMALLY. I WAS DISTRACTED BY CHANGING FROM LAX DEP CHARTS TO PHX ARR CHARTS. THE FE WAS DISTRACTED BY THE FE PANEL.

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.