Whee - Phut
Also common on the PR9 which used the Lightning's engines minus the reheat. When it happened at Nairobi Civil (Embakasi) one was in for a long wait. We finished up with a white square painted in outline on the underside of each wing, near the engine; this was where the wing had to be thumped with a hide faced hammer to free some sticking valve. Most times this resulted this resulted in Whee - Whoosh and that strange smell, rather like apples that one got from AVPIN.