Pneumatic system deactivated but indicating pressure in cruise.

Attributes
ACN	165129
Time
Date	199012
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ldn
State Reference	VA
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 1000
ASRS Report	165129
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

#2 pneumatic system was placarded inoperative by lga maintenance before departure, and all #2 failure detection systems were deactivated. During latter part of climb pressure was noted on #2 system. Tulsa tech was consulted and a decision was made to divert to closest suitable airport. Callback conversation with reporter revealed the following: closest airport was bna. Flight was cancelled and the aircraft Y ferried unpressurized to dfw. No information from company why the system was showing 13# of pressure.

Original NASA ASRS Text

Title: PNEUMATIC SYSTEM DEACTIVATED BUT INDICATING PRESSURE IN CRUISE.

Narrative: #2 PNEUMATIC SYS WAS PLACARDED INOP BY LGA MAINT BEFORE DEP, AND ALL #2 FAILURE DETECTION SYSTEMS WERE DEACTIVATED. DURING LATTER PART OF CLB PRESSURE WAS NOTED ON #2 SYS. TULSA TECH WAS CONSULTED AND A DECISION WAS MADE TO DIVERT TO CLOSEST SUITABLE ARPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: CLOSEST ARPT WAS BNA. FLT WAS CANCELLED AND THE ACFT Y FERRIED UNPRESSURIZED TO DFW. NO INFO FROM COMPANY WHY THE SYS WAS SHOWING 13# OF PRESSURE.

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.