BOAC707 From United Kingdom, joined Nov 2003, 278 posts, RR: 2 Reply 1, posted (7 years 11 months 3 weeks 5 days 22 hours ago) and read 2581 times:
Actually, back in the early 80's as a member of the RCMP, I investigated a similar case where a chunk of blue ice went through a roof of a house in Deep Cove, BC. By checking ATC records we were able to pin point the plane and the Canadian Aviation authorities went after the airline (Canadian), and the pilot.
The chunk of ice was about the same size as what is reported above. Scary how much damage can be done....
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 3 Reply 2, posted (7 years 11 months 3 weeks 5 days 13 hours ago) and read 2389 times:
There have been several incidents of "blue ice" falling from aircraft. The basic cause is a fluid leak at the lavatory service panel causing a layer of ice to form on the outside of the airplane. When its weight and/or drag reach a sufficient level, the ice breaks away from the airplane.
On the 727, there is a lavatory service panel is on the left side of the airplane forward of the wing. On at least 4 occasions, when there was a leak at that location, the ice went over the wing and into the No. 3 engine. The engine seized immediately and the rotational energy was transmitted to the engine mounts resulting in the inflight physical loss of the entire engine. Happily, there were no injuries or damage in the location where the engine landed.
There have been several Airworthiness Directives (AD's) directed towards this problem in the United States, which resulted in a decrease in leaking lavatory service panels but not a complete absence.
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 3 Reply 6, posted (7 years 11 months 3 weeks 4 days 15 hours ago) and read 2023 times:
WhiteHatter, what you are talking about is the accumulation of ice on the wing leading edge due to flying in freezing precipitation. When that comes off of an airplane, it is in little bits and pieces that don't amount to anything.
The main affect is to badly reduce the wing's lift and result in what happened in the state in Indiana several years ago.
The ice accumulation due to a leaking lavatory service panel can produce a good size chuck of "blue ice". That doesn't affect the airplane much, but it could make a mess when and where it hits the ground.
VgnAtl747 From United States of America, joined Apr 2001, 1497 posts, RR: 2 Reply 9, posted (7 years 11 months 3 weeks 4 days 9 hours ago) and read 1888 times:
I was working an IROP the other day and had some downtime to just hang out with the crew and talk- a similar topic came up, as our flight attendants are instructed to not use the galley drain, but rather to put coffee/soda/water in the physical garbage bag in the aircraft. Apparently due to the risk of the substance you're draining freezing in the drain pipe (which comes right out of the bottom of the aircraft on a CRJ, just aft of the nose gear).
There wasn't overall concern of chunks of ice falling from the aircraft, as the drain surface on the aircraft surface is heated, but rather the drain backing up and causing problems with maintenance- although I suppose if the heating surface on the underside of the aircraft was inoperable for some reason, this could potentially cause falling ice from the galley drain.