<< >> NASA ASRS Report 215170, July 1992

Cargo flight has pressurization problem on climb out. While troubleshooting, loses radio contact. Another flight relays messages that flight returning.

Attributes
ACN	215170
Time
Date	199207
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mco
State Reference	FL
Altitude	msl bound lower : 10000 msl bound upper : 10000
Aircraft 1
Controlling Facilities	artcc : zjx tower : phl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors enroute airway : mco
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 7000 flight time type : 2500
ASRS Report	215170
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other Other
Supplementary
Primary Problem	Aircraft

Narrative:

Departing mco we had a pressurization problem. We advised ZJX of the nature of our problem and requested an altitude of 10000 ft MSL to see if we could resolve it. We had been instructed previously to intercept the orl 355 degree radial, which we did. 5 mins later, about 28 DME on the 355 degree radial we requested a return to mco. After several calls and no reply from ATC, a cargo aircraft tried to assist us in communicating with ZJX. We were also unable to reach orlando approach. I asked cargo aircraft to advise ATC we were returning to mco. We turned back to mco. I started to display 7700 in the transponder for 1 min then 7600. After 30-40 seconds, ZJX responded to our call and vectored us around restr airspace. I told ZJX we were presently displaying 7700 and asked what we should squawk. He replied with another vector. I returned transponder to our original code. We returned to mco without further incident.

Related reports:

• B757 cabin altitude exceeds 10000 ft while climbing through ...
• EMB145 first officer experiences a pressurization failure du...
• An A319 captain reported cabin pressurization fluctuations i...
• A SA227 incurred an excursion from an assigned altitude due ...
• LEAR35 flight crew departing myef has pressurization problem...
• Phenom 100 captain reports not hearing a descent clearance w...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: CARGO FLT HAS PRESSURIZATION PROBLEM ON CLBOUT. WHILE TROUBLESHOOTING, LOSES RADIO CONTACT. ANOTHER FLT RELAYS MESSAGES THAT FLT RETURNING.

Narrative: DEPARTING MCO WE HAD A PRESSURIZATION PROBLEM. WE ADVISED ZJX OF THE NATURE OF OUR PROBLEM AND REQUESTED AN ALT OF 10000 FT MSL TO SEE IF WE COULD RESOLVE IT. WE HAD BEEN INSTRUCTED PREVIOUSLY TO INTERCEPT THE ORL 355 DEG RADIAL, WHICH WE DID. 5 MINS LATER, ABOUT 28 DME ON THE 355 DEG RADIAL WE REQUESTED A RETURN TO MCO. AFTER SEVERAL CALLS AND NO REPLY FROM ATC, A CARGO ACFT TRIED TO ASSIST US IN COMMUNICATING WITH ZJX. WE WERE ALSO UNABLE TO REACH ORLANDO APCH. I ASKED CARGO ACFT TO ADVISE ATC WE WERE RETURNING TO MCO. WE TURNED BACK TO MCO. I STARTED TO DISPLAY 7700 IN THE TRANSPONDER FOR 1 MIN THEN 7600. AFTER 30-40 SECONDS, ZJX RESPONDED TO OUR CALL AND VECTORED US AROUND RESTR AIRSPACE. I TOLD ZJX WE WERE PRESENTLY DISPLAYING 7700 AND ASKED WHAT WE SHOULD SQUAWK. HE REPLIED WITH ANOTHER VECTOR. I RETURNED TRANSPONDER TO OUR ORIGINAL CODE. WE RETURNED TO MCO WITHOUT FURTHER INCIDENT.

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.