|
Safety of Flight CH-47-02-06 |
|
Inspection of Combining Transmissions |
|
Summary of Problem - A unit reported that after experiencing a debris screen latch, they found plastic type debris in the combining transmission oil filter. Analysis of the debris revealed that it was plastic media. It has been determined that this material is the result of the use of plastic media blast procedure by CCAD to remove surface coatings from the housing assemblies. This procedure can leave particles inside the transmission that could interfere with necessary oil flow. See also 74-22292. |
UNCLASSIFIED
MSG DTG 190015Z JUN 02
FROM CDRAMCOM, REDSTONE ARSENAL, AL //AMSAM-SF-A//
SUBJECT - SAFETY OF FLIGHT, TECHNICAL, RCS CSGLD-1860(R1),
ALL CH/MH-47D/F SERIES AIRCRAFT, INSPECTION OF COMBINING
TRANSMISSIONS, CH-47-02-06 (TB 1-1520-240-20-148).
NOTE
THIS MESSAGE IS ISSUED IAW AR 95-1, 1 SEP 97, CHAPTER 6. THIS
MESSAGE HAS NOT BEEN TRANSMITTED TO UNITS SUBORDINATE TO
ADDRESSEES. ADDRESSEES SHOULD IMMEDIATELY RETRANSMIT THIS
MESSAGE TO ALL SUBORDINATE UNITS, ACTIVITIES OR ELEMENTS AFFECTED
OR CONCERNED. THE RETRANSMITTAL SHALL REFERENCE THE MESSAGE.
ACTION ADDRESSEES WILL IMMEDIATELY VERIFY THIS TRANSMISSION TO
CDR, AMCOM, ATTN: AMSAM-SF-A (SOF COMPLIANCE OFFICER).
1. PRIORITY CLASSIFICATION -
NOTE
IAW AR 95-1, PARAGRAPH 6-6A, MACOM COMMANDERS MAY AUTHORIZE
TEMPORARY EXCEPTION FROM MESSAGE REQUIREMENTS. EXCEPTION MAY
ONLY OCCUR WHEN COMBAT OPERATIONS OR MATTER OF LIFE OR DEATH IN
CIVIL DISASTERS OR OTHER EMERGENCIES ARE SO URGENT THAT THEY
OVERRIDE THE CONSEQUENCES OF CONTINUED AIRCRAFT OPERATION.
A. AIRCRAFT IN USE - UPON RECEIPT OF THIS MESSAGE, MAKE THE
FOLLOWING ENTRY ON THE DA FORM 2408-13-1. ENTER A RED HORIZONTAL
DASH //-// STATUS SYMBOL WITH THE FOLLOWING STATEMENT: "INSPECT
COMBINING TRANSMISSIONS IAW CH-47-02-06 (TB 1-1520-240-20-148)
PRIOR TO NEXT ENGINE START BUT NLT 25 JUN 02." CLEAR THE RED
HORIZONTAL DASH //-// ENTRY WHEN THE PROCEDURES IAW PARA 8 ARE
COMPLETED. COMMANDERS WHO ARE UNABLE TO COMPLY WITH THE
REQUIREMENTS OF THIS MESSAGE WITHIN THE TIME FRAME SPECIFIED WILL
UPGRADE THE AFFECTED AIRCRAFT STATUS SYMBOL TO A RED //X//.
B. AIRCRAFT IN MAINTENANCE -
(1) AIRCRAFT IN AVUM, AVIM OR DEPOT LEVEL MAINTENANCE -
SAME AS PARA 1A.
(2) AIRCRAFT AT CONTRACTOR FACILITY - BOEING WILL
INSPECT DD 250 AIRCRAFT PRIOR TO THOSE AIRCRAFT DEPARTING FOR
FERRY TO FINAL DESTINATION.
C. AIRCRAFT IN TRANSIT - SAME AS PARA 1A.
D. MAINTENANCE TRAINERS (CAT A AND B) - SAME AS PARA 1A.
E. COMPONENT/PARTS IN STOCK AT ALL LEVELS (DEPOT AND OTHERS)
INCLUDING WAR RESERVES - UPON RECEIPT OF THIS MESSAGE, DEPOT AND
MATERIEL ACTIVITY COMMANDERS WILL ENSURE THE MATERIEL CONDITION
TAGS OF ALL ITEMS IN ALL CONDITION CODES LISTED IN PARAGRAPH 6
ARE ANNOTATED TO READ: "CH-47-02-06 (TB 1-1520-240-20-148),
COMBINING TRANSMISSION, NOT COMPLIED WITH."
(1) WHOLESALE STOCK - UPON RECEIPT OF THIS MESSAGE,
DEPOT AND MATERIEL ACTIVITY COMMANDERS WILL ENSURE ALL ITEMS IN
CONDITION CODES //A//, //B//, //C//, //D//, AND //E//, LISTED IN
PARAGRAPH 6, ARE PLACED IN CONDITION CODE //J// AND TAGGED WITH A
SUSPENDED TAG/LABEL - MATERIEL, DD FORM 1575/DD FORM 1575-1. DO
NOT REMOVE ORIGINAL CONDITION TAGS.
(2) RETAIL STOCK - REPORT RECEIPT OF THIS MESSAGE IAW
PARAGRAPH 14C(1) NLT 21 JUN 02. UPON RECEIPT OF THIS MESSAGE,
COMMANDERS AND FACILITY MANAGERS MAINTAINING RETAIL STOCK AT
INSTALLATION LEVEL AND BELOW SHALL CONTACT THE SUPPORTED AVIATION
UNIT TO PERFORM THE PROCEDURES REQUIRED IAW PARAGRAPHS 8 AND 9 ON
SUSPECT MATERIEL. DISPOSE OF DISCREPANT MATERIEL IAW PARA 10.
REPORT COMPLIANCE WITH THIS MESSAGE IAW PARAGRAPH 14C(2) NLT 28
JUN 02.
F. COMPONENTS/PARTS IN WORK (DEPOT LEVEL AND OTHERS) - DEPOT
AND OTHER MAINTENANCE ACTIVITY COMMANDERS WILL ENSURE ITEMS
LISTED IN PARAGRAPH 6 ARE NOT ISSUED UNTIL THEY ARE IN COMPLIANCE
WITH THIS MESSAGE.
2. TASK/INSPECTION SUSPENSE DATE - COMPLETE THE INSPECTION IAW
PARAGRAPH 8 PRIOR TO NEXT ENGINE START BUT NLT 25 JUN 02 AND
REPORT IAW PARA 14A(2) NLT 28 JUN 02.
3. TAMMS REPORTING COMPLIANCE SUSPENSE DATE - REPORT COMPLIANCE
IAW PARA 14A(1) NLT 25 JUN 02.
4. SUMMARY OF PROBLEM -
A. A UNIT REPORTED THAT AFTER EXPERIENCING A DEBRIS SCREEN
LATCH, THEY FOUND PLASTIC TYPE DEBRIS IN THE COMBINING
TRANSMISSION OIL FILTER. ANALYSIS OF THE DEBRIS REVEALED THAT IT
WAS PLASTIC MEDIA. IT HAS BEEN DETERMINED THAT THIS MATERIAL IS
THE RESULT OF THE USE OF PLASTIC MEDIA BLAST PROCEDURE BY CCAD TO
REMOVE SURFACE COATINGS FROM THE HOUSING ASSEMBLIES. THIS
PROCEDURE CAN LEAVE PARTICLES INSIDE THE TRANSMISSION THAT COULD
INTERFERE WITH NECESSARY OIL FLOW.
B. MANPOWER/DOWNTIME AND FUNDING IMPACTS - SEE PARA 12.
C. THE PURPOSE OF THIS MESSAGE IS TO -
(1) CONDUCT RECORDS CHECK AND VISUAL INSPECTION OF ALL
COMBINING TRANSMISSIONS.
(2) REMOVE SPECIFIC SERIAL NUMBERED COMBINING
TRANSMISSIONS FROM SERVICE.
(3) INSPECT COMBINING TRANSMISSIONS OVERHAULED AT CCAD
BETWEEN 28 JUN 2000 THROUGH 17 JUN 2002 FOR PRESENCE OF PLASTIC
MEDIA BLAST PARTICLES.
5. END ITEMS TO BE INSPECTED - ALL CH/MH-47D/F AIRCRAFT.
6. ASSEMBLY COMPONENTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
COMBINING TRANSMISSION ASSY 145D5300-ALL ALL
7. PARTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
ELEMENT, FILTER, FLUID 145DS023-6 1650-01-117-8026
ELEMENT, FILTER, FLUID 145DS514-4 1650-01-116-2945
ELEMENT, FILTER, FLUID 145DS514-7 1650-01-116-4771
FILTER, ASSEMBLY 145DS523-2 4330-01-114-0918
8. INSPECTION PROCEDURES -
NOTE
SUPPLEMENTAL INFORMATION FOR THIS MESSAGE CAN
BE VIEWED AT (USE LOWER CASE LETTERS ONLY)
"www.redstone.army.mil/sof/suppl/c47s0206.pdf".
A. CONDUCT RECORDS REVIEW (DA FORM 2408-16 AND DA FORM
2408-5-1) AND VISUAL INSPECTION (SERIAL NUMBER VERIFICATION) OF
ALL COMBINING TRANSMISSIONS PRIOR TO NEXT ENGINE START.
NOTE
ONE-TIME FLIGHTS ARE NOT AUTHORIZED FOR THE FOLLOWING
SERIAL NUMBERED COMBINING TRANSMISSIONS WITHOUT
WRITTEN AUTHORIZATION FROM THE TECHNICAL POC.
ONE-TIME FLIGHTS AUTHORIZATIONS MAY BE APPROVED
DEPENDENT UPON SPECIAL INSPECTION RESULTS AS
DIRECTED BY THE TECHNICAL POC.
B. THE FOLLOWING SERIAL NUMBERED COMBINING TRANSMISSIONS ARE
CONSIDERED UNSERVICEABLE: A8-017, A8-066, A8-069, A8-117,
A8-125, A8-152, A8-161, A8-173, A8-197, A8-232, A8-267, A8-363,
A8-403, A8-463, A8-563, A8-583, A8-654, A8-685. IF THE SERIAL
NUMBER IS CONTAINED IN THE PRECEDING LIST, CLEAR THE ENTRY FROM
PARA 1A AND MAKE THE FOLLOWING ENTRY ON THE DA FORM 2408-13-1.
ENTER A RED //X// STATUS SYMBOL WITH THE FOLLOWING STATEMENT:
"COMBINING TRANSMISSION UNSERVICEABLE IAW CH-47-02-06 (TB 1-1520-
240-20-148)". PROCEED TO PARA 9A.
NOTE
FOR AIRCRAFT AWAY FROM HOME STATION, A ONE-TIME
FLIGHT, NOT TO EXCEED FOUR HOURS, WITH INTERMEDIATE
STOPS, IS AUTHORIZED TO RETURN TO THE NEAREST SECURED
MAINTENANCE FACILITY/HOME STATION THAT WILL
FACILITATE INSPECTION/REPAIRS. THIS AUTHORIZATION
DOES NOT APPLY TO THE SERIAL NUMBERED COMBINING
TRANSMISSIONS LISTED IN PARA 8B.
C. FOR COMBINING TRANSMISSIONS NOT LISTED ABOVE, IF LAST
OVERHAUL WAS PERFORMED AT CCAD AND WAS OVERHAULED BETWEEN 28 JUNE
2000 AND 17 JUN 2002, CONDUCT VISUAL INSPECTION OF THE MAIN,
AUXILIARY, INLET SCREEN, AND ENGINE TRANSMISSION OIL FILTERS ON
THE COMBINING TRANSMISSIONS FOR PLASTIC MEDIA BLAST PARTICLES.
(1) IF PLASTIC MEDIA BLAST PARTICLES ARE FOUND, THE
COMBINING TRANSMISSION IS CONSIDERED UNSERVICEABLE. PROCEED TO
PARA 9A.
(2) IF NO PLASTIC MEDIA BLAST PARTICLES ARE FOUND,
INSPECTION IS COMPLETE. PROCEED TO PARA 9B.
D. IF LAST OVERHAUL WAS NOT PERFORMED AT CCAD OR WAS
PERFORMED AT CCAD PRIOR TO 28 JUN 2000, COMBINING TRANSMISSION IS
CONSIDERED SERVICEABLE.
E. COMBINING TRANSMISSIONS OVERHAULED BY CCAD AFTER 17 JUN
2002 ARE CONSIDERED SERVICEABLE AND NOT AFFECTED BY THIS MESSAGE.
9. CORRECTION PROCEDURES -
A. IF THE COMBINING TRANSMISSION IS CONSIDERED UNSERVICEABLE
IAW PARAGRAPH 8 OF THIS MESSAGE, PROCEED AS FOLLOWS -
(1) REPLACE COMBINING TRANSMISSION IAW APPROPRIATE TM
PRIOR TO NEXT ENGINE START.
(2) REPLACE 2 (TWO) FILTERS (TM 55-1520-240-23P, FIG 194,
ITEM 2) PRIOR TO INSTALLATION OF NEW COMBINING TRANSMISSION.
NOTE
NORMAL PROCEDURES REQUIRE FILTERS AND PACKINGS TO
BE REPLACED WHEN REMOVED. THIS MESSAGE AUTHORIZES
A ONE-TIME RE-USE AFTER INSPECTION OF THE FILTER
AND PACKING.
B. IF NO PLASTIC MEDIA BLAST PARTICLES ARE FOUND, THE
INSPECTION IS COMPLETE. REINSTALL FILTERS AND CLEAR THE RED
HORIZONTAL DASH //-// ENTRY FROM PARA 1A.
C. IF LAST OVERHAUL WAS NOT PERFORMED AT CCAD OR WAS
PERFORMED AT CCAD PRIOR TO 28 JUN 2000 OR AFTER 17 JUN 2002,
CLEAR THE RED HORIZONTAL DASH //-// ENTRY.
10. SUPPLY/PARTS AND DISPOSITION -
NOTE
HQDA-ADCS-G-3 WILL PRIORITIZE UNITS
AND REPAIR PARTS DISTRIBUTION.
A. PARTS REQUIRED - ITEMS CITED IN PARAGRAPH 12C MAY BE
REQUIRED TO REPLACE DEFECTIVE ITEMS.
B. REQUISITIONING INSTRUCTIONS - REQUISITION REPLACEMENT
PARTS USING NORMAL SUPPLY PROCEDURES. ALL REQUISITIONS SHALL USE
PROJECT CODE (CC 57-59) "X1X" (X-RAY-ONE-X-RAY).
NOTE
PROJECT CODE "X1X" IS REQUIRED TO TRACK
AND ESTABLISH A DATA BASE OF STOCK FUND
EXPENDITURES INCURRED BY THE FIELD AS A
RESULT OF MESSAGE ACTIONS.
C. BULK AND CONSUMABLE MATERIALS -
NOMENCLATURE PART NO. NSN
ELEMENT, FILTER, FLUID 145DS023-6 1650-01-117-8026
O-RING M83248/1-134 5331-00-167-5122
ELEMENT, FILTER, FLUID 145DS514-4 1650-01-116-2945
ELEMENT, FILTER, FLUID 145DS514-7 1650-01-116-4771
O-RING M83248/1-112 5331-00-166-1060
O-RING M83248/1-116 5331-00-166-1068
O-RING M83248/1-122 5331-00-167-5111
GASKET 145DS025-11 5330-01-115-3764
FILTER, ASSEMBLY 145DS523-2 4330-01-114-0918
D. DISPOSITION - DISPOSE OF REMOVED PARTS/COMPONENTS USING
NORMAL SUPPLY PROCEDURES. ALL TURN-IN DOCUMENTS MUST INCLUDE
PROJECT CODE (CC 57-59) "X1X" (X-RAY-ONE-X-RAY).
E. DISPOSITION OF HAZARDOUS MATERIAL - IAW ENVIRONMENTAL
PROTECTION AGENCY DIRECTIVES AS IMPLEMENTED BY YOUR SERVICING
ENVIRONMENTAL COORDINATOR (AR 200-1).
11. SPECIAL TOOLS AND FIXTURES REQUIRED - AS REQUIRED.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - AVUM. AIRCRAFT DOWNTIME WILL
BE CHARGED TO AVUM MAINTENANCE. REPORT AIRCRAFT NON-MISSION
CAPABLE MAINTENANCE (NMCM) WHILE UNDERGOING INSPECTION AND
CORRECTION IAW THIS MESSAGE.
B. ESTIMATED TIME REQUIRED -
(1) TIME TO COMPLETE RECORDS CHECK - TOTAL OF 0.5 MAN-
HOURS USING 1 PERSON.
(2) TIME TO COMPLETE VISUAL INSPECTION -
(A) TOTAL OF 6 MAN-HOURS USING 1 PERSON.
(B) TOTAL OF 6 HOURS DOWNTIME FOR ONE END ITEM.
(3) TIME FOR REPAIR/REPLACEMENT -
(A) TOTAL OF 30 MAN-HOURS USING 5 PERSONS.
(B) TOTAL OF 6 HOURS DOWNTIME FOR ONE END ITEM.
C. ESTIMATED COST IMPACT TO THE FIELD -
NOMENCLATURE PART NO./NSN QTY COST EA. TOTAL $
TRANSMISSION, MECH, 145D5300-20 1 $342630.00 $342630.03
HELICOPTER 1615-01-464-3974
TOTAL COST PER AIRCRAFT = $342,630.03
D. TB/MWOS TO BE APPLIED PRIOR TO OR CONCURRENTLY WITH THIS
INSPECTION - N/A.
E. PUBLICATIONS WHICH REQUIRE CHANGE AS A RESULT OF THIS
INSPECTION - N/A.
13. REFERENCES -
A. DA PAM 738-751
B. TM 55-1520-240-23
C. TM 55-1520-240-23P
14. RECORDING AND REPORTING REQUIREMENTS -
A. AIRCRAFT -
(1) TAMMS REPORTING COMPLIANCE SUSPENSE - UPON ENTERING
REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-13-1 FOR ALL
EFFECTED AIRCRAFT, COMMANDERS WILL FORWARD A PRIORITY MESSAGE,
FAX OR EMAIL TO CDR, AMCOM, ATTN: AMSAM-SF-A (SOF COMPLIANCE
OFFICER), REDSTONE ARSENAL, AL 35898-5000, IAW AR 95-1, NLT DATE
SPECIFIED IN PARAGRAPH 3. FAX NUMBER IS DSN 897-2111 OR (256)
313-2111. EMAIL ADDRESS IS "SAFEADM@REDSTONE.ARMY.MIL". THE
REPORT WILL CITE THIS MESSAGE AND TB NUMBER, DATE OF ENTRY IN DA
FORM 2408-13-1, THE AIRCRAFT MISSION DESIGN SERIES AND SERIAL
NUMBERS OF AIRCRAFT IN NUMERICAL ORDER.
(2) TASK/INSPECTION REPORTING SUSPENSE - UPON
COMPLETION OF INSPECTION, COMMANDERS WILL FORWARD A PRIORITY
MESSAGE TO THE LOGISTICAL POINT OF CONTACT LISTED IN PARA 16B
THE REPORT WILL CITE THIS MESSAGE AND TB NUMBER, DATE OF
INSPECTION, AIRCRAFT AND COMPONENT SERIAL NUMBER, AIRCRAFT AND
COMPONENT HOURS, AND RESULTS OF THE INSPECTION. INSPECTION AND
REPORTS WILL BE COMPLETED NLT DATE SPECIFIED IN PARAGRAPH 2.
B. WHOLESALE SPARE PARTS/ASSEMBLIES - N/A.
C. RETAIL SPARE PARTS/ASSEMBLIES -
(1) REPORTING MESSAGE RECEIPT - COMMANDERS AND FACILITY
MANAGERS WILL REPORT RECEIPT OF THIS MESSAGE BY E-MAIL OR FAX TO
THE LOGISTICAL POINT OF CONTACT LISTED IN PARAGRAPH 16B NLT DATE
SPECIFIED IN PARAGRAPH 1E(2). PROVIDE LOCAL POINT OF CONTACT.
(2) TASK/INSPECTION REPORTING SUSPENSE - COMMANDERS AND
FACILITY MANAGERS WILL REPORT INSPECTION RESULTS TO THE
LOGISTICAL POINT OF CONTACT IN PARAGRAPH 16B NLT DATE SPECIFIED
IN PARAGRAPH 1E(2). REPORT THE QUANTITY INSPECTED BY CONDITION
CODE AND THE RESULTING CONDITION CODE. REPORT BY E-MAIL OR FAX
AND PROVIDE LOCAL POINT OF CONTACT.
D. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE
COMPLETED IAW DA PAM 738-751, 15 MAR 99 -
NOTE
ULLS-A USERS WILL USE APPLICABLE "E" FORMS.
(1) DA FORM 2408-5-1, EQUIPMENT MODIFICATION RECORD
(COMBINING TRANSMISSION).
(2) DA FORM 2408-13, AIRCRAFT STATUS INFORMATION
RECORD.
(3) DA FORM 2408-13-1, AIRCRAFT INSPECTION AND
MAINTENANCE RECORD.
(4) DA FORM 2408-16, AIRCRAFT COMPONENT HISTORICAL
RECORD.
(5) DA FORM 2410, COMPONENT REMOVAL AND REPAIR/OVERHAUL
RECORD. (ONLY IF COMBINING TRANSMISSION IS REPLACED)
(6) DD FORM 1575/DD FORM 1575-1, SUSPENDED TAG/LABEL -
MATERIEL (COLOR BROWN). ANNOTATE REMARKS BLOCK WITH "SUSPENDED
IAW CH-47-02-06 (TB 1-1520-240-20-148)."
(7) DD FORM 1577-2/DD FORM 1577-3, UNSERVICEABLE
(REPARABLE) TAG/LABEL - MATERIEL (COLOR GREEN). ANNOTATE REMARKS
BLOCK WITH UNSERVICEABLE IAW CH-47-02-06 (TB 1-1520-240-20-148)."
15. WEIGHT AND BALANCE - N/A.
16. POINTS OF CONTACT -
A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. STEVE
PROSISE, AMSAM-RD-AE-I-P-C, DSN 897-2350 EXTENSION 9851 OR (256)
705-9851. EMAIL IS "STEVE.PROSISE@RDEC.REDSTONE.ARMY.MIL".
B. LOGISTICAL POC IS MR. BILL OLSON, SFAE-AV-CH-L, DSN 897-
3379 OR (256) 313-3379, FAX IS EXT 4348. EMAIL IS
"WILLIAM.OLSON@PEOAVN.REDSTONE.ARMY.MIL".
C. WHOLESALE MATERIEL POINT OF CONTACT (SPARES) IS GAIL
MILES, AMSAM-MMC-AV-CA, DSN 897-1455 OR (256) 313-1455, FAX IS
DSN 897-1106. EMAIL IS "GAIL.MILES@REDSTONE.ARMY.MIL".
D. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE IS
MS. ANN WALDECK, AMSAM-MMC-MA-NM, DSN 746-5564 OR (256) 876-5564.
FAX IS DSN 746-4904 OR (256) 876-4904. EMAIL IS
"ANN.WALDECK@REDSTONE.ARMY.MIL".
E. SAFETY POINTS OF CONTACT ARE -
(1) PRIMARY - MR. RANDALL RUSHING (SAIC), AMSAM-SF-A,
DSN 897-2092 OR (256) 313-2092, FAX IS DSN 897-2111 OR (256)
313-2111. EMAIL IS "RANDALL.RUSHING@REDSTONE.ARMY.MIL".
(2) ALTERNATE - MR. RUSSELL PEUSCH, AMSAM-SF-A, DSN
788-8632 OR (256) 842-8632. FAX IS DSN 897-2111 OR (256)
313-2111. EMAIL IS "RUSSELL.PEUSCH@REDSTONE.ARMY.MIL".
F. FOREIGN MILITARY SALES RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT
MR. RONNIE W. SAMMONS, AMSAM-SA-AS-UT, DSN 897-0407 OR (256)
313-0407. FAX IS DSN 897-0411 OR (256) 313-0411. EMAIL IS
"RONNIE.SAMMONS@REDSTONE.ARMY.MIL".
G. AFTER HOURS CONTACT THE AMCOM OPERATIONS CENTER (AOC)
DSN 897-2066/7 OR (256) 313-2066/7.