OVOV--105 Panel 14L and 9R Flight Rationale105 Panel 14L and 9R Flight RationaleggPRT Review ChartsPRT Review Charts

LESS PRT LESS PRT –– 4/12/20104/12/2010

Presented by:

Mike Stoner/John Ligasg

BackgroundBackground

RCC Root Cause Investigation was completed and accepted by PRCB on 3/4/2010 Panels with IR indications above 0.2 Nv require PRT review for flight

rationale along with OPO concurrence– Review will include IR data, craze crack data, refurb history, burn

th h l ti if t d l il bilit through evaluation if warranted, spare panel availability

OV-104 currently has only 2 WLE panels with IR indications above 0.2 Nv0.2 Nv 14L 9R

Chits J6602 and J6593 were initiated for OV-105’s STS-134 Flight 25 flow Obtained IR data with T seals removed Obtained IR data with T-seals removed Obtained craze crack measurements at high Nv values

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14L IR Thermography Summary

P l 14L

Shot # Inch Mark from top of

panel

Post STS-130

Matlab (JETI

Post STS-130 Matlab

(JETI V1.55)

Post STS-127 Matlab

(JETI V1.55)

Post STS-127 Matlab (JETI

V1.55)

Post STS-126 Matlab

(JETI V1.55)

Panel 14LPN: V070-199814-031SN: SPRP14L005B2S130V105LWP14AS-25mm120hz 0006 25" - 30" 0.08 0.02 0.09 0.03 0.05

(JETI V1.55)

TEE OFF TEE OFF

B2S130V105LWP14AS-25mm120hz 0006A 28" - 33" 0.14 0.13 0.14 0.12 0.11

B2S130V105LWP14AS-25mm120hz-FLP 0007 30" - 35" 0.18 0.15 0.15 0.13 0.12

B2S130V105LWP14AS-25mm120hz-FLP 0007A 33" - 38" 0.23 0.21 0.20 0.17 0.19

B2S130V105LWP14AS 25 120h FLP 0008 35" 40" 0 22 0 21 0 20 0 17 0 18B2S130V105LWP14AS-25mm120hz-FLP 0008 35" - 40" 0.22 0.21 0.20 0.17 0.18

B2S130V105LWP14AS-25mm120hz-FLP 0008A 38" - 43" 0.23 0.18 0.22 0.18 0.14

B2S130V105LWP14AS-25mm120hz-FLP 0009 40" - 45" 0.24 0.18 0.21 0.15 0.14

B2S130V105LWP14AS-25mm120hz-FLP 0009A 43" - 48" 0.30 0.23 0.30 0.19 0.17

B2S130V105LWP14AS-25mm120hz-FLP 0010 45" - 50" 0.29 0.24 0.30 0.19 0.18

B2S130V105LWP14AS-25mm120hz-FLP 0011 50" - 55" 0.15 0.08 0.17 0.09 0.06

B2S130V105LWP14AS-25mm120hz-FLP 0012 55" - 57" N/A N/A N/A N/A 0.06

9R IR Thermography Summary

Sh t # I h M k P t P t STS P t STS P t STS P t STS 126

Panel 9RPN: V070 199809 041

Shot # Inch Mark from top of

panel

Post STS-130 Matlab (JETI

V1.55)

Post STS-130 Matlab (JETI V1.55)

Post STS-127

Matlab (JETI

V1.55)

Post STS-127

Matlab (JETI

V1.55)

Post STS-126 Matlab

(JETI V1.55)

PN: V070-199809-041SN: 105P09R007B2S130V105RWP09AS-25mm120hz 0008 35" - 40" 0.13 0.12 0.17 0.12 0.12

B2S130V105RWP09AS-25mm120hz 0008A 37.5" - 42.5" 0.16 0.13 0.17 0.14 0.17

TEE OFF TEE OFF

B2S130V105RWP09AS-25mm120hz-FLP 0009 40" - 45" 0.29 0.26 0.29 0.26 0.20B2S130V105RWP09AS-25mm120hz-FLP 0009A 42" - 47" 0.29 0.26 0.29 0.26 0.22B2S130V105RWP09AS-25mm120hz-FLP 0010 45" - 50" 0.12 0.09 0.15 0.13 0.10

B2S130V105RWP09AS-25mm120hz-FLP 0011 50" - 55" 0.05 0.03 0.08 0.04 0.04

IR & Craze Crack Data Reviewed

Panel 14L and 9R results summarized by NDE personnel in briefing dated 3/16/2010 14L

– Maximum 13 mm data 0.20 Nv– Maximum 25 mm data 0.30 Nv max (T-seal off) Maximum 25 mm data 0.30 Nv max (T seal off)

9R– Maximum 13 mm data 0.20 Nv– Maximum 25 mm data is 0.29 Nv (T-seal off)

Panel 9L and 18R craze crack results presented to LESS PRT and accepted on 4/1/10 (tentatively)accepted on 4/1/10 (tentatively) All craze cracks were less than the 0.003” requirements

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Craze Crack Summary

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Panel History

• Panel 14L (Serial SPR14LA005) has flown 24 flights on OV-105• Panel and T-seal refurbished after 19 flightsg• No repair history

• Panel 9R (Serial 10509RA006) has flown 22 flights on OV-105• Panel and T-seal refurbished after 17 flights• No repair history

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Spare Spare AvailabilityAvailability

Panel 14L and 9R both have spare panels available Panel 14L and 9R both have spare panels available 9R IR Nv is 0.11 13mm (SPRP09R009) 14L IR Nv is 0 11 13mm (SPRP14L006) 14L IR Nv is 0.11 13mm (SPRP14L006)

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PRT RecommendationPRT Recommendation

Panel 14L and 9R are acceptable for flight Pertinent data reviewed with no obvious changes/degradation Pertinent data reviewed with no obvious changes/degradation

in panel condition No PR’s required CHIT will be processed to obtain T-seal off 25 mm IR data and

craze crack measurements post STS-134– OPO direction– OPO direction

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OV-105 14L and 9R WLE RCC Panel Flight Rationale

• Panel Refurbishment is a likely precursor for significant increase in subsurface separation Panel 14L has flown 5 flights since last refurbishment Panel 14L has flown 5 flights since last refurbishment Panel 9R has flown 5 flights since last refurbishment Therefore additional substantial material separation is not expected for this

fli ht OV 1045flight on OV-1045

Cracks cracks greater than 0.003” (unfilled)/0.005” (filled) can lead to subsurface oxidation of the substrateto subsurface oxidation of the substrate All craze cracks were measured in the high IR indication areas and the cracks

were less than the 0.003”/0.005” criteria

• IR thermography indications exhibited no noticeable changes from the previous flows 25 mm data was obtained with the T-seals off to provide best data and p

correlation to root cause team test data