Failure - Interactions

There was no  official  C.A.B.-report on this  incident  (in France).

 "707 Drops Engine

              in Test Flight." 

  Cook, Robert H.       Aviation Week  (March 2, 1959),   p 33.

Phase-in problems of the Boeing 707-120  mounted last week with the in-flight loss of a right outboard engine  from a  Pan American  . . .   during a training mission north [sic, SW]  of Paris, France.

Loss of the engine came as the Civil Aeronautics Board pressed its three-week old investigation of the 29,000 ft dive taken by another of the airline's 707-120s on a Feb' 3 transatlantic flight  (AW Feb. 9, p.39). . . . 

Jet training for its pilots will be little affected since most of it has been conducted with layover time on European runs  in London  and Paris. . . .

Loss of the engine on Pan American's training flight  took place  while two of the airline's captains were undergoing a check flight  with a company check pilot, a flight engineer  and a Federal Aviation Agency safety advisor.    The crew included  instructor pilot Captain John W. Ryan; . . .  and Howard M. Cone;  . . . and Hyram Broiles,  FAA representative in Paris.

Company spokesmen  say Capt. Ryan was demonstrating minimum control speeds at 8,000 ft.  under the airlines's  prescribed training program  when the 707 stalled at an estimated speed of 120 kt.  and started into a right spin.   The plane lost 2,000 ft. of altitude  and the violence of the recovery maneuver  tore the engine and pod mounting  from the wing.

Recovery to normal flight speed and altitude was made with no difficulty,  and the aircraft was flown to London  where more complete maintenance facilities are available.

Fell in Pasture

FAA  later reported that the engine was recovered  in a pasture  near the village of Pioneis  on the Brest peninsula.   Condition of the powerplant was not reported,  but agency spokesman expect their examination to settle any question,  such as possible engine malfunction,  such as possible turbine seizure,  or whether  the accident resulted from an airframe deficiency.

Although the investigation is in its early stages,  with both CAB and FAA representatives in London and Paris,  some FAA observers feel there may be some doubts on repeating this type maneuver  which subjects the aircraft to unusual,  and possibly unnecessary,  structural strains.    Final results of a formal investigation could possibly recommend both a strengthening of airframe components   and a  change in airline  jet training maneuvers,   according to FAA officials.

Boeing Aircraft Co.  made no particular comment on the accident   other than that its field representatives  in London  are working with Pan American  on the case. . . .

[This _AW_ story  continued with further details uncovered during the C.A.B.'s investigation of the   earlier   inflight upset  of 3Feb59 over the North Atlantic.]

UPI.   "Jet Airliner Drops Engine in France."    New York Times   (February 25, 1959),    p 62:

Pan American 707 . . . right outboard engine had torn loose . . . sudden spin  during . . . demonstration of minimum control speed. . . .   Captain John Ryan . . . Captain Howard Cone . . . landed London . . .  engine plummeted . . . field on a farm . . . southwest of Paris, where the training flight originated . . . 

Pan Am   B707    /   25 Feb 1959    N709PA

Crew training,    Loss-of-Control,    violent upset
separation of  #4 engine,     southwest of Paris.