Robert Moore wrote in
5.250:

Bertie the Bunyip wrote
You remember correctly, but only for the transversely mounted APUs in
the 707 and 727.

No APUs in 707s, but I have seen some private operators put a unit in
the forward cargo compartment that swung out and sat on the ground for
operation.


OK, Seen a few that had them and was led to believe they had the same
installation as the 727.



Bertie