Date: 201205
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Learjet 55
Operator: Corporate
Operating under: Part 91
Flight plan: IFR
Mission: Passenger
Flight phase: Initial Climb
Airspace: Class B ZZZ
ATC / advisory: TRACON ZZZ
Aircraft component: Aeroplane Flight Control
Component problem: Improperly Operated
Reporter organization: Corporate
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Human factors: Confusion; Distraction; Situational Awareness; Troubleshooting; Workload; Communication Breakdown
Anomaly: Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Deviation - Speed All Types; Inflight Event / Encounter Loss Of Aircraft Control
Detector: Person Flight Crew
When detected: In-flight
Result: Air Traffic Control Provided Assistance; Flight Crew Regained Aircraft Control; Flight Crew Overcame Equipment Problem
Contributing factors: Aircraft; Human Factors
Primary problem: Human Factors

Narrative: I was the flying pilot and PIC. The First Officer ran the taxi and lineup checklist. Just after takeoff at the end of the first segment climb; I called for gear up. The First Officer put the gear lever up and high pressure; hot air; high decibel level noise and particulate debris filled the cockpit and cabin. At V2+30 I called for flaps up. The First Officer failed to respond to the command. All annunciators were cold at this time. The First Officer then moved his left hand to the center pedestal and moved a switch after which pitch trim on the yoke was lost; the aircraft pitched up to 10 degrees and the pitch trim annunciator warning came on. Center had cleared us to 3;000 MSL. I locked both arms to try and stop the climb and; as the aircraft began to climb through 3;000 MSL; commanded the First Officer to call Departure and get a block altitude up to 12;000 MSL and to advise them we had both pitch trim and pressurization problems. Center cleared us to maintain a block altitude of 3;000 through 12;000 MSL. I then commanded the First Officer to move the Pitch Trim to Secondary and move the Up/Down switch to down and I was able to level the aircraft. I then selected Pitch to Primary and electric trim on the yoke became responsive again. Then the Overspeed Alarm came on and I reduced power in response. I again commanded flaps up but the First Officer had become fixated on the engine instruments and did not respond so I selected flaps up myself. I called for the Emergency Pressurization to be reset. The First Officer did not respond so I reached over and reset both Emergency Pressurization switches. The hot; high pressure; bleed air immediately shut off and I determined the aircraft was back to a fully nominal operational status. We advised ATC the aircraft was fully functional and we were able to continue the trip. As we climbed through FL190; I instructed the First Officer to check on the passengers and explain the situation. The passengers were shaken up but medically fine and desired to continue the trip to our destination. The balance of the trip was normal.




Synopsis: A Learjet flight crew encountered multiple flight path control and system anomalies; some of which may have been self inflicted; immediately after takeoff. All were resolved with the assistance of ATC who provided a large block altitude in which they were able to return the aircraft to normal operations.