Lockheed Martin engineers have evaluated what was being described as “low foam” on the closeout of repairs on the nose cone of ET-124.
The hail damaged tank is undergoing Ogive Pencil Point BX-265 (foam) trim operations during these final stages of completing the requirements for rollout. However, Atlantis will head to Pad 39A on the 16th, following a review of the tank repairs on Friday.
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**Previous articles related to the ET damage events: Article 1 – Article 2 – Article 3 – Article 4 – Article 5 – Article 6 – Article 7 – Article 8 – Article 9 – Article 10 – Article 11 – Article 12 – Article 13 – Article 14 – Article 15 – Article 16** – Article 17** – Article 18** – Article 19** – Article 20** click for more screenshots of the damage.
The machine trim was performed on the pencil sharpener area on Wednesday, where it was noticed that several large patches around the top of the LO2 tank appeared to be undersprayed.
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Images show the trim was successful. However, observations showed that some of the ‘smoothed’ down areas in question had what appeared to be dips, which are the areas where Lockheed Martin engineers are evaluating a course of action, which could include flying as-is.
Other options include another trim operation, then respraying the cone area. The evaluations include how the area will react with the thermal issues associated with loading the tank with super cold propellants, and aerodynamic issues with the tank during ascent.
Lockheed Martin today decided to trim down some areas of the tank today, and more is expected to be trimmed on Friday, in what is a delicate operation. The effort is be carried out slowely as to ensure workers do not remove too much foam from the areas.
NASA managers made no reference to the low foam issue during a press conference today, despite the issue being documented over the past two days on NASA presentations.
However, the issue appears to be within tolerances for a final trim, with the confirmation of rollout on the 16th – or maybe even the 15th – being noted by shuttle manager Wayne Hale.
Further articles will follow. Please refer to the live update pages on L2 (for NASA presentations, memos, emails and images) and on Atlantis’ section (open to all).
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