TBM 700/TBM 850
Flight Crew Multiengine; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 180; Flight Crew Total 10500; Flight Crew Type 2800
Training / Qualification; Situational Awareness
Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action; General Maintenance Action
Aircraft; Human Factors; Procedure
At FL240 aircraft began to show inability to maintain cabin pressure with cabin altitude slowly rising. Requested descent to FL220 precautionary. Upon reaching FL220 BLEED OFF annunciated; bleed flow turned off and cabin pressure began to dump to ambient. Emergency procedures followed; with oxygen mask donned and communication established with ZZZ [Center]. Requested and initiated an [expedited] descent to 12;000 initially at a maximum rate of descent observing maximum airspeed limits. Requested and received headings for ZZZ. Below 12;000 feet oxygen mask was removed and normal communications re-established with center. Handed off to ZZZ1 approach for vectors to ZZZ. Handed off to tower for an uneventful landing. Was not asked for a follow up phone call by tower so did not initiate one.No damage to the aircraft beyond the ruptured pressurization supply line that precipitated the [event]. Only myself on board so no exposure of passengers to the experience.All that I would have done differently would have been to initiate a more aggressive descent upon first seeing that the cabin was not maintaining a normal pressure in order to have perhaps precluded the [event]. There were no other indications in the cockpit that anything was amiss until the catastrophic failure of the pressure line.
Pilot reported an expedited descent after a bleed air supply duct failed and cabin pressure was lost. Pilot reported making a normal landing.