Bristol Britannia

British Eagle Flight 802 departed London-Heathrow Airport at 12:04 GMT with destination Innsbruck, Austria. At 13:35 the flight contacted Munich ATC and reported over the Kempten NDB nine minutes later, changing its IFR flight plan to VFR from Kempten to Innsbruck. Two minutes later the crew contacted Innsbruck and reported descending VMC directly to Seefeld. Over the Innsbruck VOR at FL110, the airplane was still unable to break the clouds. The last message from the flight was at 14:12 when it reported at FL100. The descent was continued until the airplane collided with the steep eastern flank of the Glungezer Mountain at an altitude of 2601 m (8500 ft). An avalanche occurred, carrying most of the aircraft debris downhill for about 400 m. All 83 occupants were killed.

The aircraft had arrived in Honolulu at 0507 hours Hawaiian standard time on 21 July as CPA Flight 323 from Vancouver, British Columbia, Canada. It was departing, the evening of 22 July, as Empress Flight 301 on a scheduled international flight for Nadi (Fiji Islands), Auckland (New Zealand) and Sydney (Australia). The night takeoff was commenced at 22:38 hours local time and approximately two minutes after becoming airborne and during the climbout a fire warning indication for No 1 engine was received in the cockpit. The No. 1 propeller was feathered and the tower controller was advised that the aircraft was returning to Honolulu. As an over-gross landing weight condition existed, fuel jettisoning in the amount of 35000 lb was carried out The jettisoning operation was completed at 23:06 hours following which the flight was vectored west of the outer marker to Intercept the ILS final approach course for runway 08. The three-engine landing approach appeared normal until the aircraft had proceeded beyond the runway threshold and had commenced its landing flare at an altitude of approximately 20 feet above the runway centreline. A go-around was attempted from this position, and the aircraft banked and veered sharply to the left. Initial ground contact was made by the left wing tip approximately 550 feet to the left of the runway centreline and approximately 700 feet beyond the threshold of the runway. The aircraft progressively disintegrated as it moved across the ground, then struck heavy earth-moving equipment parked approximately 970 feet from the runway centreline.

En route from Cairo to Khartoum at an altitude of 20,500 feet, a loss of hydraulic pressure occurred. The crew continued the flight and started the descent to Khartoum. While completing the approach checklist, the crew was unable to lower the landing gear, even with the emergency systems. The captain decided to complete a belly landing on the sandy area alongside the runway. The airplane slid for hundreds yards before coming to rest. All 27 occupants were evacuated safely while the aircraft was damaged beyond repair.

The airplane departed London-Heathrow Airport at 1010LT on a test flight regarding the renewal of its Certificate of Airworthiness. After performing the necessary test, the crew requested a descent from 12,000 feet to 3,000 feet. Three minutes after starting the descent, while cruising in a visibility reduced by fog, the aircraft struck the ground and crashed in a field located in Winkton, southeast of Bournemouth-Hurn Airport. Seven occupants were killed while three others were seriously injured. The aircraft disintegrated on impact.

The Bristol 175 had just completed a test flight of 1 and 40 minutes. Tests included a strain-gauge measurements on the non-standard propeller of the no. 2 engine, and high speed upset manoeuvre recovery tests in connection with the US certification. Returning to Filton, the aircraft entered a circuit and partial gear extensions occurred for unknown reasons. Attempts may have been made to complete undercarriage free fall tests as these had failed the previous day; such test were not on the programme however. At 1500 feet a left turn to base leg was initiated. The right wing suddenly dropped and the aircraft went into a very steeply banked right hand turn. The Britannia briefly recovered but banked steeply again and struck the ground in a wood near a residential area.

The crew (Bristol pilots and engineers and KLM pilots) was performing a test flight out from Bristol-Filton Airport. About seven minutes after takeoff, the engine number three temperature rose. The engine was shut down and later restarted as the temperature cooled. While climbing to an altitude of 10,000 feet, the temperature rose again and the engine exploded. The fire could not be extinguished and as a precaution, it was decided to shot down the engine number four and to return to Filton. On approach, both left engines stopped but were quickly restarted. In such conditions, the captain decided to attempt a belly landing in the Severn estuary, off Littleton-upon-Severn. All 13 occupants escaped with minor injuries while the aircraft was damaged beyond repair.
Source:
http://www.bristol-britannia.com/p/history-of-romeo-x-ray.html