PA32 landing lgb enters crossing runway while exiting.

Attributes
ACN	585811
Time
Date	200306
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lgb.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lgb.tower tower : fll.tower
Operator	general aviation : personal
Make Model Name	PA-32 Cherokee Six/Lance/Saratoga
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : lgb.tower
Make Model Name	Commercial Fixed Wing
Flight Phase	descent : approach
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 2000 flight time total : 2200
ASRS Report	585811
Person 2
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : published procedure non adherence : clearance non adherence : far
Independent Detector	other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On an IFR flight plan, after landing on runway 30, with 'hold short runway 25R' from ATC and a heavy aircraft on approach behind us, we exited the runway as soon as practicable. As we approached the intersection of runway 30 with runway 25L, I turned at runway 25L onto its parallel taxiway. This involved a brief (5-10 second) turn onto runway 25L. I felt we were, by definition, cleared to cross runway 25L and that the brief turn into it would clear runway 30 quickly for following traffic and pose no safety threat since we were already cleared across it. Therefore, it was not, at the time, active. ATC advised we had turned onto an 'active runway.' in retrospect, that turn should not have been made without specific clearance, no matter how expedient. It is important never to forget training and procedure, no matter how 'logical' or 'expedient' it may seem. We have ATC/aviation procedures for a reason -- predictability and safety.

Original NASA ASRS Text

Title: PA32 LNDG LGB ENTERS XING RWY WHILE EXITING.

Narrative: ON AN IFR FLT PLAN, AFTER LNDG ON RWY 30, WITH 'HOLD SHORT RWY 25R' FROM ATC AND A HVY ACFT ON APCH BEHIND US, WE EXITED THE RWY AS SOON AS PRACTICABLE. AS WE APCHED THE INTXN OF RWY 30 WITH RWY 25L, I TURNED AT RWY 25L ONTO ITS PARALLEL TXWY. THIS INVOLVED A BRIEF (5-10 SECOND) TURN ONTO RWY 25L. I FELT WE WERE, BY DEFINITION, CLRED TO CROSS RWY 25L AND THAT THE BRIEF TURN INTO IT WOULD CLR RWY 30 QUICKLY FOR FOLLOWING TFC AND POSE NO SAFETY THREAT SINCE WE WERE ALREADY CLRED ACROSS IT. THEREFORE, IT WAS NOT, AT THE TIME, ACTIVE. ATC ADVISED WE HAD TURNED ONTO AN 'ACTIVE RWY.' IN RETROSPECT, THAT TURN SHOULD NOT HAVE BEEN MADE WITHOUT SPECIFIC CLRNC, NO MATTER HOW EXPEDIENT. IT IS IMPORTANT NEVER TO FORGET TRAINING AND PROC, NO MATTER HOW 'LOGICAL' OR 'EXPEDIENT' IT MAY SEEM. WE HAVE ATC/AVIATION PROCS FOR A REASON -- PREDICTABILITY AND SAFETY.

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.